[2020] Gamepass version crashes on start up

Has this game ever worked on this machine? Or never yet?

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  

Your antivirus app is getting in the way of the launcher and the game writing out its settings files.

[18:33:14][pdx_assert.cpp:568]: Assertion failed: pdx_settings.txt permission denied
[18:33:14][virtualfilesystem_physfs.cpp:1574]: Could not open file: pdx_settings.txt, error: pdx_settings.txt permission denied
[18:33:14][pdx_text_settings.cpp:154]: Could not write settings: Could not open file: pdx_settings.txt

Which one do you use?

Unfortunately with the Gampass edition, adding exceptions to AV apps is a little tricky as you can't navigate directly to the game's folders, Microsoft lock them down pretty hard.  

Flubiliu said: . I still got an error message about "saving mod load order failing" and that I should make sure that the launcher has access to my documents folder... ok... BUT the game started and seems playable.

That means your Windows User Documents folder. I don't know Avast in detail but you'll need to make sure it allows the game and launcher to write to those folders.

Good luck!