[2020] I could play and not now. Gammepass W10

Not sure why that would be, the game itself did not change at that point.

Can you uninstall the game, check for updates via the Windows Store app (particularly to the Xbox app and the Gaming Service), then run the Xbox app and see if it loads then?  

What antivirus app do you use?

DXDIAG is a program you run from a command prompt or the Windows start menu 'run' dialog box (or 'search programs' in Windows 7 or later). After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.

Please attach your Documents/Paradox/CK3/pdx_settings.txt .
From your Documents/Paradox/CK3/logs/ folder, attach system.log , error.log