che: Workspace panel actions are not working

Describe the bug

I opened my usual self-hosting workspace this morning and ended up with an empty workspace. I saw no source in the explorer and I could not open any terminals in containers. After realizing I had no workspace roots open, I opened one by hand and my projects appeared. I could now open terminals in user containers, but not in any containers inside the “plugins” folder in the “my workspace” sidebar.

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

Start a workspace and try to use any action from the Workspace panel. Also see: https://github.com/eclipse/che/issues/19441#issuecomment-809240864

Expected behavior

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Installation method

• chectl
  • provide a full command that was used to deploy Eclipse Che (including the output)
  • provide an output of chectl version command
• OperatorHub
• I don’t know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• Dev Sandbox (workspaces.openshift.com)
• other: please specify

Eclipse Che Logs

Additional context