Cannot open files using finder - in some folders only

Hi - thanks for the help. Here is the situation, i could not find the solution.

• Ventura 13.3.1, macbook pro
• In some folders only, files can no longer be opened using double click or even right click open / file / with app. The app actually starts but nothing else happens, there is no error message.
• This happens with all files, regardless of file type
• This event was sudden, not linked to system update or migration
• These files are still accessible using the apps directly though open / file. They are not corrupted.
• Permissions have been checked at file or folder level, no issue there
• System restarted a coupe of times, no change