[2021] Error all at line 412

I see you have a problem mod called out in that file, are any mods at all enabled in this campaign?  

Me either, but I don't get most of them in my vanilla game. Probably worthwhile to do a full **clean** re-install:

- move any valued save games elsewhere
- "uninstall" in Steam-CK3
- manually delete both the Steam/SteamApps/common/CK3 AND Documents/Paradox Interactive/CK3 folders
- re-install game in Steam, run a Steam Verify when done.
- add CK3.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 CK3 or Documents CK3 locations, before installing again.  

GundamMerc said: The only thing left to do is perhaps try downloading the game directly from here and just bypass any steam shenanigans that is preserving whatever file is causing this every time.

I doubt very much this is anything to do with Steam, but you can simply test that by running ck3.exe directly from File Explorer.  

GundamMerc said: I don't mean that steam is directly causing it, but that steam isn't allowing me to do a true clean install.

I'm not sure what you can be referring to really. The only two folders the game uses are the ones I listed in post #5 above - if you deleted both those folders that's as clean as it gets!

You can test your new theory by installing our non-Steam client (aka launcher v1):

Play on Paradox technology | Paradox Interactive

Link your Steam and Paradox Accounts together and be one of the first to try out the latest Paradox technology. Join now and be part of the journey of building great services around our games. play.paradoxplaza.com Once running you can install a separate version of CK3 there - are you still getting that issue?