[2022] Weird error message

I'm already helping you in a ZenDesk ticket on this.  

I had them do a clean reinstall. They never replied to that suggestion so I can only assume it worked.

- move any valued save games elsewhere
- "uninstall" in Steam-EU4
- manually delete both the Steam/SteamApps/common/EU4 AND Documents/Paradox Interactive/EU4 folders
- re-install game in Steam, run a Steam Verify when done.
- add EU4.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.
- start the game with no mods active and test

In particular make sure there are no files or folders left under either the Steam EU4 or Documents EU4 locations, before installing again.  

I have no idea, I am sorry. I'm not involved in the development of this game (or indeed of any game) nor do I have the time to play it in any seriousness.

Maybe try the main forum here?