As a developer, your self-hosted runner sometimes looses connection while running jobs.

Set the DEBUG environment variable to true before starting the self-hosted runner to produce more verbose console output.

Locate the self-hosted runner in your repository's settings page and download its log archive.

Access the self-hosted runner's installation directory and look for log files in the _diag folder.

Start the self-hosted runner with the --debug flag to produce more verbose console output.