The self-hosted runner: arm64-8csm9-runner-jx2pj 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.

Create Artifact Container failed: Request timeout: /WFCPMoGSMZ8BQdAewDljy7p4gmUG9WwzdJmKx68hZ6xMmgEGTt/_apis/pipelines/workflows/8458480906/artifacts?api-version=6.0-preview