Instance task acknowledgment request has failed (ID: 397dbabf-d9dd-443c-a9c3-a3c98995b9da, HTTP status code: 404)

The self-hosted runner: be729bac-9c63-49a6-8c5b-1730a87825cd 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.

Instance stop request has failed (HTTP status code: 500, body: Failed to stop backend instance (reason: backend provider not found with instance key: InstanceHashMapKey("21ae59e699eb8909f75275cb07c76d5f32ce7c3c", "be729bac-9c63-49a6-8c5b-1730a87825cd")))

Instance stop request has failed (HTTP status code: 500, body: Failed to stop backend instance (reason: backend provider not found with instance key: InstanceHashMapKey("21ae59e699eb8909f75275cb07c76d5f32ce7c3c", "be729bac-9c63-49a6-8c5b-1730a87825cd")))

Instance stop request has failed (HTTP status code: 500, body: Failed to stop backend instance (reason: backend provider not found with instance key: InstanceHashMapKey("21ae59e699eb8909f75275cb07c76d5f32ce7c3c", "be729bac-9c63-49a6-8c5b-1730a87825cd")))

Instance stop request has failed after 3 attempts

Cannot read properties of undefined (reading 'task_id')

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636