Errors notifications shown during trying to invoke the python language server functions

[Ohrimenko1988]

Describe the bug

Errors notifications shown during trying to invoke the python language server functions

Che version

• [ x ] latest
• nightly
• other: please specify

Steps to reproduce

• Go to dashboard and create workspace using the "Python" default devfile
• Go inside created workspace and open the "hello-world.py" file
• Try to press the "ctrl + space" combination on the "print" word
• Pay attention to the shown error notifications https://user-images.githubusercontent.com/22724619/124749756-4dfed200-df2d-11eb-9ee0-8ae701c07085.png
• Pay attention that functionality works despite errors. https://user-images.githubusercontent.com/22724619/124749991-98804e80-df2d-11eb-8e6f-2ce606d7595a.png
• Type the "err" word at the 7-th row to invoke error highlighting
• Pay attention that error highlighting doesn't work https://user-images.githubusercontent.com/22724619/125253211-d8ff1400-e301-11eb-8676-a4994c614362.png

Expected behavior

The language server functionality works and no error message shown

Observed behavior

The autocomplete functionality works but notifications with error messages are shown.
Error highlighting doesn't work.

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• [ x ] 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

Container logs:
python-container.log

Installation method

• [ x ] chectl

chectl server:deploy \
  --k8spodreadytimeout=600000 \
  --k8spodwaittimeout=600000 \
  --k8spoddownloadimagetimeout=600000 \
  --listr-renderer=verbose \
  --platform=minikube \
  --chenamespace=iokhrime-che \
  --telemetry=off

• OperatorHub
• I don't know

Environment

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

Eclipse Che Logs

Additional context

[nickboldt]

Python is a key language and is GA supported in CRW. Moving from P2 to P1, as this is more urgent.