plotly plot data not being rendered

[stemann]

Description

Voilà fails to render plot data for a simple notebook with a plotly plot.

Notebook rendering

Voilà rendering

Reproduce

1. Create a python (3) notebook with contents:

import ipywidgets as widgets
import plotly.graph_objects as go
fig = go.FigureWidget()
fig.add_scatter(y=[2, 1, 4, 3])
fig
layout = widgets.Layout(width="100%")
tab = widgets.Tab(layout=layout)
tab.children = [
    fig
]
tab.set_title(0, "PT")
tab

2. Right-click on notebook file, click on 'Open with', and then 'Voilà Preview'.

Expected behavior

Expected plot data to be rendered (as well as plot UI etc.)

Context

• voila version: 0.5.8

• Operating System and version: Ubuntu Linux 24.04

• Browser and version: Safari 17.4.1 (but issue also manifests itself on other browsers)

• ipywidgets 8.1.7

• plotly 6.1.2

Troubleshoot Output

(base) jovyan@9235eaf06875:~$ jupyter troubleshoot
$PATH:
        /opt/conda/bin
        /opt/conda/condabin
        /home/jovyan/.local/julia/bin
        /home/jovyan/.yarn/bin
        /home/jovyan/.local/bin
        /home/jovyan/bin
        /opt/conda/bin
        /usr/local/sbin
        /usr/local/bin
        /usr/sbin
        /usr/bin
        /sbin
        /bin
        /home/jovyan/.dotnet
sys.path:

/opt/conda/bin

/home/jovyan

/opt/conda/lib/python312.zip

/opt/conda/lib/python3.12

/opt/conda/lib/python3.12/lib-dynload

/opt/conda/lib/python3.12/site-packages
sys.executable:

/opt/conda/bin/python3.12
sys.version:

3.12.11 | packaged by conda-forge | (main, Jun  4 2025, 14:45:31) [GCC 13.3.0]
platform.platform():

Linux-6.6.31-linuxkit-x86_64-with-glibc2.39
which -a jupyter:

/opt/conda/bin/jupyter

/opt/conda/bin/jupyter
pip list:

Package                   Version

------------------------- --------------

aiohappyeyeballs          2.6.1

aiohttp                   3.12.13

aiosignal                 1.3.2

alembic                   1.16.1

annotated-types           0.7.0

anyio                     4.9.0

anywidget                 0.9.18

appdirs                   1.4.4

archspec                  0.2.5

argon2-cffi               25.1.0

argon2-cffi-bindings      21.2.0

arrow                     1.3.0

astor                     0.8.1

asttokens                 3.0.0

async_generator           1.10

async-lru                 2.0.5

attrs                     25.3.0

babel                     2.17.0

backoff                   2.2.1

beautifulsoup4            4.13.4

bleach                    6.2.0

blinker                   1.9.0

boltons                   25.0.0

bqplot                    0.12.45

Brotli                    1.1.0

cached-property           1.5.2

cachetools                6.1.0

certifi                   2025.6.15

certipy                   0.2.2

cffi                      1.17.1

chardet                   5.2.0

charset-normalizer        3.4.2

chemicals                 1.3.3

colorama                  0.4.6

comm                      0.2.2

conda                     25.5.1

conda-libmamba-solver     25.4.0

conda-package-handling    2.4.0

conda_package_streaming   0.11.0

cryptography              45.0.4

dateutils                 0.6.12

debugpy                   1.8.14

decorator                 5.2.1

defusedxml                0.7.1

distro                    1.9.0

duckdb                    1.3.1

et_xmlfile                2.0.0

exceptiongroup            1.3.0

executing                 2.2.0

fastjsonschema            2.21.1

filelock                  3.18.0

fluids                    1.1.0

fqdn                      1.5.1

frozendict                2.4.6

frozenlist                1.7.0

gast                      0.4.0

greenlet                  3.2.3

gw_dsl_parser             0.1.49.1

h11                       0.16.0

h2                        4.2.0

hpack                     4.1.0

httpcore                  1.0.9

httpx                     0.28.1

hyperframe                6.1.0

idna                      3.10

importlib_metadata        8.7.0

importlib_resources       6.5.2

ipydatagrid               1.4.0

ipykernel                 6.29.5

ipylab                    1.0.0

ipysheet                  0.7.0

ipython                   9.3.0

ipython_genutils          0.2.0

ipython_pygments_lexers   1.1.1

ipyvue                    1.11.2

ipyvuetify                1.11.2

ipywidgets                8.1.7

isoduration               20.11.0

jedi                      0.19.2

Jinja2                    3.1.6

json5                     0.12.0

jsonpatch                 1.33

jsonpointer               3.0.0

jsonschema                4.24.0

jsonschema-specifications 2025.4.1

juliacall                 0.9.25

juliapkg                  0.1.17

jupyter_client            8.6.3

jupyter_core              5.8.1

jupyter-events            0.12.0

jupyter-lsp               2.2.5

jupyter-resource-usage    1.1.1

jupyter_server            2.16.0

jupyter_server_proxy      4.4.0

jupyter_server_terminals  0.5.3

jupyterhub                5.3.0

jupyterlab                4.4.3

jupyterlab_execute_time   3.2.0

jupyterlab_pygments       0.3.0

jupyterlab-quarto         0.3.5

jupyterlab_server         2.27.3

jupyterlab_widgets        3.0.15

jupytext                  1.17.2

kanaries_track            0.0.5

libmambapy                2.3.0

Mako                      1.3.10

markdown-it-py            3.0.0

MarkupSafe                3.0.2

matplotlib-inline         0.1.7

mdit-py-plugins           0.4.2

mdurl                     0.1.2

menuinst                  2.2.0

mistune                   3.1.3

monotonic                 1.6

multidict                 6.5.0

narwhals                  1.43.1

nbclassic                 1.3.1

nbclient                  0.10.2

nbconvert                 7.16.6

nbformat                  5.10.4

nest_asyncio              1.6.0

notebook                  7.4.3

notebook_shim             0.2.4

numpy                     1.26.4

oauthlib                  3.2.2

openpyxl                  3.1.5

overrides                 7.7.0

packaging                 25.0

pamela                    1.2.0

pandas                    2.3.0

pandocfilters             1.5.0

parso                     0.8.4

pexpect                   4.9.0

pickleshare               0.7.5

pillow                    11.2.1

pip                       25.1.1

pkgutil_resolve_name      1.3.10

platformdirs              4.3.8

plotly                    6.1.2

pluggy                    1.6.0

prometheus_client         0.22.1

prompt_toolkit            3.0.51

propcache                 0.3.2

psutil                    5.9.8

psygnal                   0.13.0

ptyprocess                0.7.0

pure_eval                 0.2.3

py2vega                   0.6.1

pyarrow                   20.0.0

pycosat                   0.6.6

pycparser                 2.22

pydantic                  2.11.7

pydantic_core             2.33.2

Pygments                  2.19.1

pygwalker                 0.4.9.15

PyJWT                     2.10.1

pymonolith                0.1.35

pyparsing                 3.2.3

PySocks                   1.7.1

python-dateutil           2.9.0.post0

python-json-logger        2.0.7

pytz                      2025.2

PyYAML                    6.0.2

pyzmq                     26.4.0

quickjs                   1.19.4

rdkit                     2025.3.3

referencing               0.36.2

requests                  2.32.4

rfc3339_validator         0.1.4

rfc3986-validator         0.1.1

rpds-py                   0.25.1

ruamel.yaml               0.18.14

ruamel.yaml.clib          0.2.8

scipy                     1.15.3

segment-analytics-python  2.2.3

semver                    3.0.4

Send2Trash                1.8.3

setuptools                80.9.0

simpervisor               1.0.0

six                       1.17.0

sniffio                   1.3.1

soupsieve                 2.7

SQLAlchemy                2.0.41

sqlglot                   26.29.0

stack_data                0.6.3

tenacity                  8.3.0

terminado                 0.18.1

thermo                    0.4.2

tinycss2                  1.4.0

tomli                     2.2.1

tornado                   6.5.1

tqdm                      4.67.1

traitlets                 5.14.3

traittypes                0.2.1

truststore                0.10.1

types-python-dateutil     2.9.0.20250516

typing_extensions         4.14.0

typing-inspection         0.4.1

typing_utils              0.1.0

tzdata                    2025.2

uri-template              1.3.0

urllib3                   2.4.0

voila                     0.5.8

wasmtime                  33.0.0

wcwidth                   0.2.13

webcolors                 24.11.1

webencodings              0.5.1

websocket-client          1.8.0

websockets                10.4

wheel                     0.45.1

widgetsnbextension        4.0.14

yarl                      1.20.1

zipp                      3.23.0

zstandard                 0.23.0
conda list:

# packages in environment at /opt/conda:

#

# Name                           Version          Build               Channel

_libgcc_mutex                    0.1              conda_forge         conda-forge

_openmp_mutex                    4.5              2_gnu               conda-forge

aiohappyeyeballs                 2.6.1            pypi_0              pypi

aiohttp                          3.12.13          pypi_0              pypi

aiosignal                        1.3.2            pypi_0              pypi

alembic                          1.16.1           pyhd8ed1ab_0        conda-forge

annotated-types                  0.7.0            pyhd8ed1ab_1        conda-forge

anyio                            4.9.0            pyh29332c3_0        conda-forge

anywidget                        0.9.18           pypi_0              pypi

appdirs                          1.4.4            pypi_0              pypi

archspec                         0.2.5            pyhd8ed1ab_0        conda-forge

argon2-cffi                      25.1.0           pyhd8ed1ab_0        conda-forge

argon2-cffi-bindings             21.2.0           py312h66e93f0_5     conda-forge

arrow                            1.3.0            pyhd8ed1ab_1        conda-forge

astor                            0.8.1            pypi_0              pypi

asttokens                        3.0.0            pyhd8ed1ab_1        conda-forge

async-lru                        2.0.5            pyh29332c3_0        conda-forge

async_generator                  1.10             pyhd8ed1ab_2        conda-forge

attrs                            25.3.0           pyh71513ae_0        conda-forge

babel                            2.17.0           pyhd8ed1ab_0        conda-forge

backoff                          2.2.1            pypi_0              pypi

beautifulsoup4                   4.13.4           pyha770c72_0        conda-forge

bleach                           6.2.0            pyh29332c3_4        conda-forge

bleach-with-css                  6.2.0            h82add2a_4          conda-forge

blinker                          1.9.0            pyhff2d567_0        conda-forge

boltons                          25.0.0           pyhd8ed1ab_0        conda-forge

bqplot                           0.12.45          pypi_0              pypi

brotli-python                    1.1.0            py312h2ec8cdc_3     conda-forge

bzip2                            1.0.8            h4bc722e_7          conda-forge

c-ares                           1.34.5           hb9d3cd8_0          conda-forge

ca-certificates                  2025.6.15        hbd8a1cb_0          conda-forge

cached-property                  1.5.2            hd8ed1ab_1          conda-forge

cached_property                  1.5.2            pyha770c72_1        conda-forge

cachetools                       6.1.0            pypi_0              pypi

certifi                          2025.6.15        pyhd8ed1ab_0        conda-forge

certipy                          0.2.2            pyhd8ed1ab_0        conda-forge

cffi                             1.17.1           py312h06ac9bb_0     conda-forge

chardet                          5.2.0            pypi_0              pypi

charset-normalizer               3.4.2            pyhd8ed1ab_0        conda-forge

chemicals                        1.3.3            pypi_0              pypi

colorama                         0.4.6            pyhd8ed1ab_1        conda-forge

comm                             0.2.2            pyhd8ed1ab_1        conda-forge

conda                            25.5.1           py312h7900ff3_0     conda-forge

conda-libmamba-solver            25.4.0           pyhd8ed1ab_0        conda-forge

conda-package-handling           2.4.0            pyh7900ff3_2        conda-forge

conda-package-streaming          0.11.0           pyhd8ed1ab_1        conda-forge

cpp-expected                     1.1.0            hff21bea_1          conda-forge

cryptography                     45.0.4           py312hda17c39_0     conda-forge

dateutils                        0.6.12           pypi_0              pypi

debugpy                          1.8.14           py312h2ec8cdc_0     conda-forge

decorator                        5.2.1            pyhd8ed1ab_0        conda-forge

defusedxml                       0.7.1            pyhd8ed1ab_0        conda-forge

distro                           1.9.0            pyhd8ed1ab_1        conda-forge

duckdb                           1.3.1            pypi_0              pypi

et-xmlfile                       2.0.0            pypi_0              pypi

exceptiongroup                   1.3.0            pyhd8ed1ab_0        conda-forge

executing                        2.2.0            pyhd8ed1ab_0        conda-forge

filelock                         3.18.0           pypi_0              pypi

fluids                           1.1.0            pypi_0              pypi

fmt                              11.1.4           h07f6e7f_1          conda-forge

fqdn                             1.5.1            pyhd8ed1ab_1        conda-forge

frozendict                       2.4.6            py312h66e93f0_0     conda-forge

frozenlist                       1.7.0            pypi_0              pypi

gast                             0.4.0            pypi_0              pypi

greenlet                         3.2.3            py312h2ec8cdc_0     conda-forge

gw-dsl-parser                    0.1.49.1         pypi_0              pypi

h11                              0.16.0           pyhd8ed1ab_0        conda-forge

h2                               4.2.0            pyhd8ed1ab_0        conda-forge

hpack                            4.1.0            pyhd8ed1ab_0        conda-forge

httpcore                         1.0.9            pyh29332c3_0        conda-forge

httpx                            0.28.1           pyhd8ed1ab_0        conda-forge

hyperframe                       6.1.0            pyhd8ed1ab_0        conda-forge

icu                              75.1             he02047a_0          conda-forge

idna                             3.10             pyhd8ed1ab_1        conda-forge

importlib-metadata               8.7.0            pyhe01879c_1        conda-forge

importlib_resources              6.5.2            pyhd8ed1ab_0        conda-forge

ipydatagrid                      1.4.0            pypi_0              pypi

ipykernel                        6.29.5           pyh3099207_0        conda-forge

ipylab                           1.0.0            pypi_0              pypi

ipysheet                         0.7.0            pypi_0              pypi

ipython                          9.3.0            pyhfa0c392_0        conda-forge

ipython_genutils                 0.2.0            pyhd8ed1ab_2        conda-forge

ipython_pygments_lexers          1.1.1            pyhd8ed1ab_0        conda-forge

ipyvue                           1.11.2           pypi_0              pypi

ipyvuetify                       1.11.2           pypi_0              pypi

ipywidgets                       8.1.7            pypi_0              pypi

isoduration                      20.11.0          pyhd8ed1ab_1        conda-forge

jedi                             0.19.2           pyhd8ed1ab_1        conda-forge

jinja2                           3.1.6            pyhd8ed1ab_0        conda-forge

json5                            0.12.0           pyhd8ed1ab_0        conda-forge

jsonpatch                        1.33             pyhd8ed1ab_1        conda-forge

jsonpointer                      3.0.0            py312h7900ff3_1     conda-forge

jsonschema                       4.24.0           pyhd8ed1ab_0        conda-forge

jsonschema-specifications        2025.4.1         pyh29332c3_0        conda-forge

jsonschema-with-format-nongpl    4.24.0           hd8ed1ab_0          conda-forge

juliacall                        0.9.25           pypi_0              pypi

juliapkg                         0.1.17           pypi_0              pypi

jupyter-lsp                      2.2.5            pyhe01879c_2        conda-forge

jupyter-resource-usage           1.1.1            pypi_0              pypi

jupyter-server-proxy             4.4.0            pypi_0              pypi

jupyter_client                   8.6.3            pyhd8ed1ab_1        conda-forge

jupyter_core                     5.8.1            pyh31011fe_0        conda-forge

jupyter_events                   0.12.0           pyh29332c3_0        conda-forge

jupyter_server                   2.16.0           pyhe01879c_0        conda-forge

jupyter_server_terminals         0.5.3            pyhd8ed1ab_1        conda-forge

jupyterhub-base                  5.3.0            pyhda7c55b_0        conda-forge

jupyterhub-singleuser            5.3.0            h4422900_0          conda-forge

jupyterlab                       4.4.3            pyhd8ed1ab_0        conda-forge

jupyterlab-execute-time          3.2.0            pypi_0              pypi

jupyterlab-quarto                0.3.5            pypi_0              pypi

jupyterlab-widgets               3.0.15           pypi_0              pypi

jupyterlab_pygments              0.3.0            pyhd8ed1ab_2        conda-forge

jupyterlab_server                2.27.3           pyhd8ed1ab_1        conda-forge

jupytext                         1.17.2           pypi_0              pypi

kanaries-track                   0.0.5            pypi_0              pypi

keyutils                         1.6.1            h166bdaf_0          conda-forge

krb5                             1.21.3           h659f571_0          conda-forge

ld_impl_linux-64                 2.43             h1423503_5          conda-forge

libarchive                       3.8.1            gpl_h98cc613_100    conda-forge

libcurl                          8.14.1           h332b0f4_0          conda-forge

libedit                          3.1.20250104     pl5321h7949ede_0    conda-forge

libev                            4.33             hd590300_2          conda-forge

libexpat                         2.7.0            h5888daf_0          conda-forge

libffi                           3.4.6            h2dba641_1          conda-forge

libgcc                           15.1.0           h767d61c_2          conda-forge

libgcc-ng                        15.1.0           h69a702a_2          conda-forge

libgomp                          15.1.0           h767d61c_2          conda-forge

libiconv                         1.18             h4ce23a2_1          conda-forge

liblzma                          5.8.1            hb9d3cd8_2          conda-forge

libmamba                         2.3.0            h44402ff_1          conda-forge

libmambapy                       2.3.0            py312hd15d01f_1     conda-forge

libnghttp2                       1.64.0           h161d5f1_0          conda-forge

libnsl                           2.0.1            hd590300_0          conda-forge

libsodium                        1.0.20           h4ab18f5_0          conda-forge

libsolv                          0.7.33           h7955e40_0          conda-forge

libsqlite                        3.50.1           hee588c1_0          conda-forge

libssh2                          1.11.1           hcf80075_0          conda-forge

libstdcxx                        15.1.0           h8f9b012_2          conda-forge

libstdcxx-ng                     15.1.0           h4852527_2          conda-forge

libuuid                          2.38.1           h0b41bf4_0          conda-forge

libuv                            1.51.0           hb9d3cd8_0          conda-forge

libxcrypt                        4.4.36           hd590300_1          conda-forge

libxml2                          2.13.8           h4bc477f_0          conda-forge

libzlib                          1.3.1            hb9d3cd8_2          conda-forge

lz4-c                            1.10.0           h5888daf_1          conda-forge

lzo                              2.10             hd590300_1001       conda-forge

mako                             1.3.10           pyhd8ed1ab_0        conda-forge

mamba                            2.3.0            h233bd08_1          conda-forge

markdown-it-py                   3.0.0            pypi_0              pypi

markupsafe                       3.0.2            py312h178313f_1     conda-forge

matplotlib-inline                0.1.7            pyhd8ed1ab_1        conda-forge

mdit-py-plugins                  0.4.2            pypi_0              pypi

mdurl                            0.1.2            pypi_0              pypi

menuinst                         2.2.0            py312h7900ff3_0     conda-forge

mistune                          3.1.3            pyh29332c3_0        conda-forge

monotonic                        1.6              pypi_0              pypi

multidict                        6.5.0            pypi_0              pypi

narwhals                         1.43.1           pypi_0              pypi

nbclassic                        1.3.1            pyhe01879c_0        conda-forge

nbclient                         0.10.2           pyhd8ed1ab_0        conda-forge

nbconvert-core                   7.16.6           pyh29332c3_0        conda-forge

nbformat                         5.10.4           pyhd8ed1ab_1        conda-forge

ncurses                          6.5              h2d0b736_3          conda-forge

nest-asyncio                     1.6.0            pyhd8ed1ab_1        conda-forge

nlohmann_json                    3.11.3           he02047a_1          conda-forge

nodejs                           22.13.0          hf235a45_0          conda-forge

notebook                         7.4.3            pyhd8ed1ab_0        conda-forge

notebook-shim                    0.2.4            pyhd8ed1ab_1        conda-forge

numpy                            1.26.4           pypi_0              pypi

oauthlib                         3.2.2            pyhd8ed1ab_1        conda-forge

openpyxl                         3.1.5            pypi_0              pypi

openssl                          3.5.0            h7b32b05_1          conda-forge

overrides                        7.7.0            pyhd8ed1ab_1        conda-forge

packaging                        25.0             pyh29332c3_1        conda-forge

pamela                           1.2.0            pyhd8ed1ab_1        conda-forge

pandas                           2.3.0            pypi_0              pypi

pandocfilters                    1.5.0            pyhd8ed1ab_0        conda-forge

parso                            0.8.4            pyhd8ed1ab_1        conda-forge

pexpect                          4.9.0            pyhd8ed1ab_1        conda-forge

pickleshare                      0.7.5            pyhd8ed1ab_1004     conda-forge

pillow                           11.2.1           pypi_0              pypi

pip                              25.1.1           pyh8b19718_0        conda-forge

pkgutil-resolve-name             1.3.10           pyhd8ed1ab_2        conda-forge

platformdirs                     4.3.8            pyhe01879c_0        conda-forge

plotly                           6.1.2            pypi_0              pypi

pluggy                           1.6.0            pyhd8ed1ab_0        conda-forge

prometheus_client                0.22.1           pyhd8ed1ab_0        conda-forge

prompt-toolkit                   3.0.51           pyha770c72_0        conda-forge

propcache                        0.3.2            pypi_0              pypi

psutil                           5.9.8            pypi_0              pypi

psygnal                          0.13.0           pypi_0              pypi

ptyprocess                       0.7.0            pyhd8ed1ab_1        conda-forge

pure_eval                        0.2.3            pyhd8ed1ab_1        conda-forge

py2vega                          0.6.1            pypi_0              pypi

pyarrow                          20.0.0           pypi_0              pypi

pybind11-abi                     4                hd8ed1ab_3          conda-forge

pycosat                          0.6.6            py312h66e93f0_2     conda-forge

pycparser                        2.22             pyh29332c3_1        conda-forge

pydantic                         2.11.7           pyh3cfb1c2_0        conda-forge

pydantic-core                    2.33.2           py312h680f630_0     conda-forge

pygments                         2.19.1           pyhd8ed1ab_0        conda-forge

pygwalker                        0.4.9.15         pypi_0              pypi

pyjwt                            2.10.1           pyhd8ed1ab_0        conda-forge

pymonolith                       0.1.35           pypi_0              pypi

pyparsing                        3.2.3            pypi_0              pypi

pysocks                          1.7.1            pyha55dd90_7        conda-forge

python                           3.12.11          h9e4cc4f_0_cpython  conda-forge

python-dateutil                  2.9.0.post0      pyhff2d567_1        conda-forge

python-fastjsonschema            2.21.1           pyhd8ed1ab_0        conda-forge

python-json-logger               2.0.7            pyhd8ed1ab_0        conda-forge

python_abi                       3.12             7_cp312             conda-forge

pytz                             2025.2           pyhd8ed1ab_0        conda-forge

pyyaml                           6.0.2            py312h178313f_2     conda-forge

pyzmq                            26.4.0           pypi_0              pypi

quickjs                          1.19.4           pypi_0              pypi

rdkit                            2025.3.3         pypi_0              pypi

readline                         8.2              h8c095d6_2          conda-forge

referencing                      0.36.2           pyh29332c3_0        conda-forge

reproc                           14.2.5.post0     hb9d3cd8_0          conda-forge

reproc-cpp                       14.2.5.post0     h5888daf_0          conda-forge

requests                         2.32.4           pyhd8ed1ab_0        conda-forge

rfc3339-validator                0.1.4            pyhd8ed1ab_1        conda-forge

rfc3986-validator                0.1.1            pyh9f0ad1d_0        conda-forge

rpds-py                          0.25.1           py312h680f630_0     conda-forge

ruamel.yaml                      0.18.14          py312h66e93f0_0     conda-forge

ruamel.yaml.clib                 0.2.8            py312h66e93f0_1     conda-forge

scipy                            1.15.3           pypi_0              pypi

segment-analytics-python         2.2.3            pypi_0              pypi

semver                           3.0.4            pypi_0              pypi

send2trash                       1.8.3            pyh0d859eb_1        conda-forge

setuptools                       80.9.0           pyhff2d567_0        conda-forge

simdjson                         3.13.0           h84d6215_0          conda-forge

simpervisor                      1.0.0            pypi_0              pypi

six                              1.17.0           pyhd8ed1ab_0        conda-forge

sniffio                          1.3.1            pyhd8ed1ab_1        conda-forge

soupsieve                        2.7              pyhd8ed1ab_0        conda-forge

sqlalchemy                       2.0.41           py312h66e93f0_0     conda-forge

sqlglot                          26.29.0          pypi_0              pypi

stack_data                       0.6.3            pyhd8ed1ab_1        conda-forge

tenacity                         8.3.0            pypi_0              pypi

terminado                        0.18.1           pyh0d859eb_0        conda-forge

thermo                           0.4.2            pypi_0              pypi

tinycss2                         1.4.0            pyhd8ed1ab_0        conda-forge

tk                               8.6.13           noxft_hd72426e_102  conda-forge

tomli                            2.2.1            pyhd8ed1ab_1        conda-forge

tornado                          6.5.1            py312h66e93f0_0     conda-forge

tqdm                             4.67.1           pyhd8ed1ab_1        conda-forge

traitlets                        5.14.3           pyhd8ed1ab_1        conda-forge

traittypes                       0.2.1            pypi_0              pypi

truststore                       0.10.1           pyh29332c3_0        conda-forge

types-python-dateutil            2.9.0.20250516   pyhd8ed1ab_0        conda-forge

typing-extensions                4.14.0           h32cad80_0          conda-forge

typing-inspection                0.4.1            pyhd8ed1ab_0        conda-forge

typing_extensions                4.14.0           pyhe01879c_0        conda-forge

typing_utils                     0.1.0            pyhd8ed1ab_1        conda-forge

tzdata                           2025.2           pypi_0              pypi

uri-template                     1.3.0            pyhd8ed1ab_1        conda-forge

urllib3                          2.4.0            pyhd8ed1ab_0        conda-forge

voila                            0.5.8            pypi_0              pypi

wasmtime                         33.0.0           pypi_0              pypi

wcwidth                          0.2.13           pyhd8ed1ab_1        conda-forge

webcolors                        24.11.1          pyhd8ed1ab_0        conda-forge

webencodings                     0.5.1            pyhd8ed1ab_3        conda-forge

websocket-client                 1.8.0            pyhd8ed1ab_1        conda-forge

websockets                       10.4             pypi_0              pypi

wheel                            0.45.1           pyhd8ed1ab_1        conda-forge

widgetsnbextension               4.0.14           pypi_0              pypi

yaml                             0.2.5            h7f98852_2          conda-forge

yaml-cpp                         0.8.0            h3f2d84a_0          conda-forge

yarl                             1.20.1           pypi_0              pypi

zeromq                           4.3.5            h3b0a872_7          conda-forge

zipp                             3.23.0           pyhd8ed1ab_0        conda-forge

zlib                             1.3.1            hb9d3cd8_2          conda-forge

zstandard                        0.23.0           py312h66e93f0_2     conda-forge

zstd                             1.5.7            hb8e6e7a_2          conda-forge
conda env:

name: base

channels:

- conda-forge

dependencies:

- _libgcc_mutex=0.1=conda_forge

- _openmp_mutex=4.5=2_gnu

- alembic=1.16.1=pyhd8ed1ab_0

- annotated-types=0.7.0=pyhd8ed1ab_1

- anyio=4.9.0=pyh29332c3_0

- archspec=0.2.5=pyhd8ed1ab_0

- argon2-cffi=25.1.0=pyhd8ed1ab_0

- argon2-cffi-bindings=21.2.0=py312h66e93f0_5

- arrow=1.3.0=pyhd8ed1ab_1

- asttokens=3.0.0=pyhd8ed1ab_1

- async-lru=2.0.5=pyh29332c3_0

- async_generator=1.10=pyhd8ed1ab_2

- attrs=25.3.0=pyh71513ae_0

- babel=2.17.0=pyhd8ed1ab_0

- beautifulsoup4=4.13.4=pyha770c72_0

- bleach=6.2.0=pyh29332c3_4

- bleach-with-css=6.2.0=h82add2a_4

- blinker=1.9.0=pyhff2d567_0

- boltons=25.0.0=pyhd8ed1ab_0

- brotli-python=1.1.0=py312h2ec8cdc_3

- bzip2=1.0.8=h4bc722e_7

- c-ares=1.34.5=hb9d3cd8_0

- ca-certificates=2025.6.15=hbd8a1cb_0

- cached-property=1.5.2=hd8ed1ab_1

- cached_property=1.5.2=pyha770c72_1

- certifi=2025.6.15=pyhd8ed1ab_0

- certipy=0.2.2=pyhd8ed1ab_0

- cffi=1.17.1=py312h06ac9bb_0

- charset-normalizer=3.4.2=pyhd8ed1ab_0

- colorama=0.4.6=pyhd8ed1ab_1

- comm=0.2.2=pyhd8ed1ab_1

- conda=25.5.1=py312h7900ff3_0

- conda-libmamba-solver=25.4.0=pyhd8ed1ab_0

- conda-package-handling=2.4.0=pyh7900ff3_2

- conda-package-streaming=0.11.0=pyhd8ed1ab_1

- cpp-expected=1.1.0=hff21bea_1

- cryptography=45.0.4=py312hda17c39_0

- debugpy=1.8.14=py312h2ec8cdc_0

- decorator=5.2.1=pyhd8ed1ab_0

- defusedxml=0.7.1=pyhd8ed1ab_0

- distro=1.9.0=pyhd8ed1ab_1

- exceptiongroup=1.3.0=pyhd8ed1ab_0

- executing=2.2.0=pyhd8ed1ab_0

- fmt=11.1.4=h07f6e7f_1

- fqdn=1.5.1=pyhd8ed1ab_1

- frozendict=2.4.6=py312h66e93f0_0

- greenlet=3.2.3=py312h2ec8cdc_0

- h11=0.16.0=pyhd8ed1ab_0

- h2=4.2.0=pyhd8ed1ab_0

- hpack=4.1.0=pyhd8ed1ab_0

- httpcore=1.0.9=pyh29332c3_0

- httpx=0.28.1=pyhd8ed1ab_0

- hyperframe=6.1.0=pyhd8ed1ab_0

- icu=75.1=he02047a_0

- idna=3.10=pyhd8ed1ab_1

- importlib-metadata=8.7.0=pyhe01879c_1

- importlib_resources=6.5.2=pyhd8ed1ab_0

- ipykernel=6.29.5=pyh3099207_0

- ipython=9.3.0=pyhfa0c392_0

- ipython_genutils=0.2.0=pyhd8ed1ab_2

- ipython_pygments_lexers=1.1.1=pyhd8ed1ab_0

- isoduration=20.11.0=pyhd8ed1ab_1

- jedi=0.19.2=pyhd8ed1ab_1

- jinja2=3.1.6=pyhd8ed1ab_0

- json5=0.12.0=pyhd8ed1ab_0

- jsonpatch=1.33=pyhd8ed1ab_1

- jsonpointer=3.0.0=py312h7900ff3_1

- jsonschema=4.24.0=pyhd8ed1ab_0

- jsonschema-specifications=2025.4.1=pyh29332c3_0

- jsonschema-with-format-nongpl=4.24.0=hd8ed1ab_0

- jupyter-lsp=2.2.5=pyhe01879c_2

- jupyter_client=8.6.3=pyhd8ed1ab_1

- jupyter_core=5.8.1=pyh31011fe_0

- jupyter_events=0.12.0=pyh29332c3_0

- jupyter_server=2.16.0=pyhe01879c_0

- jupyter_server_terminals=0.5.3=pyhd8ed1ab_1

- jupyterhub-base=5.3.0=pyhda7c55b_0

- jupyterhub-singleuser=5.3.0=h4422900_0

- jupyterlab=4.4.3=pyhd8ed1ab_0

- jupyterlab_pygments=0.3.0=pyhd8ed1ab_2

- jupyterlab_server=2.27.3=pyhd8ed1ab_1

- keyutils=1.6.1=h166bdaf_0

- krb5=1.21.3=h659f571_0

- ld_impl_linux-64=2.43=h1423503_5

- libarchive=3.8.1=gpl_h98cc613_100

- libcurl=8.14.1=h332b0f4_0

- libedit=3.1.20250104=pl5321h7949ede_0

- libev=4.33=hd590300_2

- libexpat=2.7.0=h5888daf_0

- libffi=3.4.6=h2dba641_1

- libgcc=15.1.0=h767d61c_2

- libgcc-ng=15.1.0=h69a702a_2

- libgomp=15.1.0=h767d61c_2

- libiconv=1.18=h4ce23a2_1

- liblzma=5.8.1=hb9d3cd8_2

- libmamba=2.3.0=h44402ff_1

- libmambapy=2.3.0=py312hd15d01f_1

- libnghttp2=1.64.0=h161d5f1_0

- libnsl=2.0.1=hd590300_0

- libsodium=1.0.20=h4ab18f5_0

- libsolv=0.7.33=h7955e40_0

- libsqlite=3.50.1=hee588c1_0

- libssh2=1.11.1=hcf80075_0

- libstdcxx=15.1.0=h8f9b012_2

- libstdcxx-ng=15.1.0=h4852527_2

- libuuid=2.38.1=h0b41bf4_0

- libuv=1.51.0=hb9d3cd8_0

- libxcrypt=4.4.36=hd590300_1

- libxml2=2.13.8=h4bc477f_0

- libzlib=1.3.1=hb9d3cd8_2

- lz4-c=1.10.0=h5888daf_1

- lzo=2.10=hd590300_1001

- mako=1.3.10=pyhd8ed1ab_0

- mamba=2.3.0=h233bd08_1

- markupsafe=3.0.2=py312h178313f_1

- matplotlib-inline=0.1.7=pyhd8ed1ab_1

- menuinst=2.2.0=py312h7900ff3_0

- mistune=3.1.3=pyh29332c3_0

- nbclassic=1.3.1=pyhe01879c_0

- nbclient=0.10.2=pyhd8ed1ab_0

- nbconvert-core=7.16.6=pyh29332c3_0

- nbformat=5.10.4=pyhd8ed1ab_1

- ncurses=6.5=h2d0b736_3

- nest-asyncio=1.6.0=pyhd8ed1ab_1

- nlohmann_json=3.11.3=he02047a_1

- nodejs=22.13.0=hf235a45_0

- notebook=7.4.3=pyhd8ed1ab_0

- notebook-shim=0.2.4=pyhd8ed1ab_1

- oauthlib=3.2.2=pyhd8ed1ab_1

- openssl=3.5.0=h7b32b05_1

- overrides=7.7.0=pyhd8ed1ab_1

- packaging=25.0=pyh29332c3_1

- pamela=1.2.0=pyhd8ed1ab_1

- pandocfilters=1.5.0=pyhd8ed1ab_0

- parso=0.8.4=pyhd8ed1ab_1

- pexpect=4.9.0=pyhd8ed1ab_1

- pickleshare=0.7.5=pyhd8ed1ab_1004

- pip=25.1.1=pyh8b19718_0

- pkgutil-resolve-name=1.3.10=pyhd8ed1ab_2

- platformdirs=4.3.8=pyhe01879c_0

- pluggy=1.6.0=pyhd8ed1ab_0

- prometheus_client=0.22.1=pyhd8ed1ab_0

- prompt-toolkit=3.0.51=pyha770c72_0

- ptyprocess=0.7.0=pyhd8ed1ab_1

- pure_eval=0.2.3=pyhd8ed1ab_1

- pybind11-abi=4=hd8ed1ab_3

- pycosat=0.6.6=py312h66e93f0_2

- pycparser=2.22=pyh29332c3_1

- pydantic=2.11.7=pyh3cfb1c2_0

- pydantic-core=2.33.2=py312h680f630_0

- pygments=2.19.1=pyhd8ed1ab_0

- pyjwt=2.10.1=pyhd8ed1ab_0

- pysocks=1.7.1=pyha55dd90_7

- python=3.12.11=h9e4cc4f_0_cpython

- python-dateutil=2.9.0.post0=pyhff2d567_1

- python-fastjsonschema=2.21.1=pyhd8ed1ab_0

- python-json-logger=2.0.7=pyhd8ed1ab_0

- python_abi=3.12=7_cp312

- pytz=2025.2=pyhd8ed1ab_0

- pyyaml=6.0.2=py312h178313f_2

- readline=8.2=h8c095d6_2

- referencing=0.36.2=pyh29332c3_0

- reproc=14.2.5.post0=hb9d3cd8_0

- reproc-cpp=14.2.5.post0=h5888daf_0

- requests=2.32.4=pyhd8ed1ab_0

- rfc3339-validator=0.1.4=pyhd8ed1ab_1

- rfc3986-validator=0.1.1=pyh9f0ad1d_0

- rpds-py=0.25.1=py312h680f630_0

- ruamel.yaml=0.18.14=py312h66e93f0_0

- ruamel.yaml.clib=0.2.8=py312h66e93f0_1

- send2trash=1.8.3=pyh0d859eb_1

- setuptools=80.9.0=pyhff2d567_0

- simdjson=3.13.0=h84d6215_0

- six=1.17.0=pyhd8ed1ab_0

- sniffio=1.3.1=pyhd8ed1ab_1

- soupsieve=2.7=pyhd8ed1ab_0

- sqlalchemy=2.0.41=py312h66e93f0_0

- stack_data=0.6.3=pyhd8ed1ab_1

- terminado=0.18.1=pyh0d859eb_0

- tinycss2=1.4.0=pyhd8ed1ab_0

- tk=8.6.13=noxft_hd72426e_102

- tomli=2.2.1=pyhd8ed1ab_1

- tornado=6.5.1=py312h66e93f0_0

- tqdm=4.67.1=pyhd8ed1ab_1

- traitlets=5.14.3=pyhd8ed1ab_1

- truststore=0.10.1=pyh29332c3_0

- types-python-dateutil=2.9.0.20250516=pyhd8ed1ab_0

- typing-extensions=4.14.0=h32cad80_0

- typing-inspection=0.4.1=pyhd8ed1ab_0

- typing_extensions=4.14.0=pyhe01879c_0

- typing_utils=0.1.0=pyhd8ed1ab_1

- uri-template=1.3.0=pyhd8ed1ab_1

- urllib3=2.4.0=pyhd8ed1ab_0

- wcwidth=0.2.13=pyhd8ed1ab_1

- webcolors=24.11.1=pyhd8ed1ab_0

- webencodings=0.5.1=pyhd8ed1ab_3

- websocket-client=1.8.0=pyhd8ed1ab_1

- wheel=0.45.1=pyhd8ed1ab_1

- yaml=0.2.5=h7f98852_2

- yaml-cpp=0.8.0=h3f2d84a_0

- zeromq=4.3.5=h3b0a872_7

- zipp=3.23.0=pyhd8ed1ab_0

- zlib=1.3.1=hb9d3cd8_2

- zstandard=0.23.0=py312h66e93f0_2

- zstd=1.5.7=hb8e6e7a_2

- pip:

- aiohappyeyeballs==2.6.1

- aiohttp==3.12.13

- aiosignal==1.3.2

- anywidget==0.9.18

- appdirs==1.4.4

- astor==0.8.1

- backoff==2.2.1

- bqplot==0.12.45

- cachetools==6.1.0

- chardet==5.2.0

- chemicals==1.3.3

- dateutils==0.6.12

- duckdb==1.3.1

- et-xmlfile==2.0.0

- filelock==3.18.0

- fluids==1.1.0

- frozenlist==1.7.0

- gast==0.4.0

- gw-dsl-parser==0.1.49.1

- ipydatagrid==1.4.0

- ipylab==1.0.0

- ipysheet==0.7.0

- ipyvue==1.11.2

- ipyvuetify==1.11.2

- ipywidgets==8.1.7

- juliacall==0.9.25

- juliapkg==0.1.17

- jupyter-resource-usage==1.1.1

- jupyter-server-proxy==4.4.0

- jupyterlab-execute-time==3.2.0

- jupyterlab-quarto==0.3.5

- jupyterlab-widgets==3.0.15

- jupytext==1.17.2

- kanaries-track==0.0.5

- markdown-it-py==3.0.0

- mdit-py-plugins==0.4.2

- mdurl==0.1.2

- monotonic==1.6

- multidict==6.5.0

- narwhals==1.43.1

- numpy==1.26.4

- openpyxl==3.1.5

- pandas==2.3.0

- pillow==11.2.1

- plotly==6.1.2

- propcache==0.3.2

- psutil==5.9.8

- psygnal==0.13.0

- py2vega==0.6.1

- pyarrow==20.0.0

- pygwalker==0.4.9.15

- pymonolith==0.1.35

- pyparsing==3.2.3

- pyzmq==26.4.0

- quickjs==1.19.4

- rdkit==2025.3.3

- scipy==1.15.3

- segment-analytics-python==2.2.3

- semver==3.0.4

- simpervisor==1.0.0

- sqlglot==26.29.0

- tenacity==8.3.0

- thermo==0.4.2

- traittypes==0.2.1

- tzdata==2025.2

- voila==0.5.8

- wasmtime==33.0.0

- websockets==10.4

- widgetsnbextension==4.0.14

- yarl==1.20.1

prefix: /opt/conda

Command Line Output

Paste the output from your command line running `voila` here, use `--debug` if possible.

Browser Output

Paste the output from your browser Javascript console here.

If using JupyterLab

• JupyterLab version: 4.4.3

Installed Labextensions

(base) jovyan@9235eaf06875:~$ jupyter labextension list
JupyterLab v4.4.3
/opt/conda/share/jupyter/labextensions
        jupyterlab_pygments v0.3.0 enabled OK (python, jupyterlab_pygments)
        jupyter-vue v1.11.2 enabled OK
        bqplot v0.5.46 enabled  X (python, bqplot)
        jupyter-vuetify v1.11.2 enabled OK
        jupyterlab-quarto v0.3.5 enabled OK (python, jupyterlab-quarto)
        anywidget v0.9.18 enabled OK
        ipydatagrid v1.4.0 enabled OK
        jupyterlab-execute-time v3.2.0 enabled OK (python, jupyterlab_execute_time)
        ipylab v1.0.0 enabled OK (python, ipylab)
        ipysheet v0.7.0 enabled  X (python, ipysheet)
        jupyterlab-jupytext v1.4.4 enabled OK (python, jupytext)
/opt/conda/lib/python3.12/site-packages/jupyterlab/debuglog.py:54: UserWarning: An error occurred.
  warnings.warn("An error occurred.")
/opt/conda/lib/python3.12/site-packages/jupyterlab/debuglog.py:55: UserWarning: KeyError: 'packageManager'
  warnings.warn(msg[-1].strip())
/opt/conda/lib/python3.12/site-packages/jupyterlab/debuglog.py:56: UserWarning: See the log file for details: /tmp/jupyterlab-debug-_tnldq4c.log
  warnings.warn(f"See the log file for details: {log_path!s}")

[mgmarino]

I am seeing this, too. I am wondering if it's somewhere related to this issue plotly/plotly.py#4998. In other words, this seems to only happen when the plotly figure is rendered within other widgets. My expectation is that voila is doing something a little different than what the normal jupyter is doing to render (perhaps relying upon these old variable names?).