The self-hosted runner: gcc-10.3.0_openmpi-4.1.6--dd58824e-9d0a-4e53-9a1d-775de5a4664a 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.