The self-hosted runner lost communication with the server. Verify the machine is running and has a healthy network connection. Anything in your workflow that terminates the runner process, starves it for CPU/Memory, or blocks its network access can cause this error.

Error: ENOENT: no such file or directory, opendir '/home/runner/_work/aptos-core/aptos-core/target/tests/target'

ENOENT: no such file or directory, opendir '/home/runner/_work/aptos-core/aptos-core/target/tests/target'

Unable to download artifact(s): Artifact not found for name: lcov_smoke Please ensure that your artifact is not expired and the artifact was uploaded using a compatible version of toolkit/upload-artifact. For more information, visit the GitHub Artifacts FAQ: https://github.com/actions/toolkit/blob/main/packages/artifact/docs/faq.md

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/