PyCharm community edition 2021.3 does not display the "Highlight: All Problems" option

Hi, could you please show a screenshot of the whole IDE window demonstrating the issue, with the file and the project view opened?

OK

My screenshot

All files are considered to be not belonging to the project for some reason. Could you please try:

1. Close PyCharm.

2. Remove .idea folder from the project root.

3. Reopen the project in PyCharm.

This recipe solved my problems

Thank you