The hosted runner lost communication with the server. Anything in your workflow that terminates the runner process, starves it for CPU/Memory, or blocks its network access can cause this error.

1 issue was detected with this workflow: CodeQL language 'javascript' is referenced by more than one entry in the 'language' matrix parameter for job 'analyze'. This may result in duplicate alerts. Please edit the 'language' matrix parameter to keep only one of the following: 'javascript', 'typescript'.

"The ubuntu-latest label will migrate to Ubuntu 26 beginning October 19, 2026. For more information, see https://github.com/actions/runner-images/issues/14748"