Discord certainly has an overlay in Windows, I'd assume it does in Linux too.
That CPU is okay, I was wondering if you had one of the 12-14gen ones which have the famous hardware fault.
I don't really have a lot else to suggest; I guess we could do a clean reinstall - see if that cleans up that error log:
- move any valued save games elsewhere
- "uninstall" in Steam-Vic3
- manually delete both the Steam/SteamApps/common/Victoria3 AND Documents/Paradox Interactive/Victoria3 folders - In particular make sure there are no files or folders left under either the Steam Victoria3 or Documents Victoria3 locations, before installing again.
- re-install game in Steam, run a Steam Verify when done.
- start the game with no mods active and test with a new campaign, NOT any existing one
If you still get this problem, can I get new copies of all those files please.