[2021] Any mods cause crash [Linux]

Hard to say really, it's not a known issue with the game on any OS.

This is literally any mod whatsoever, such new music or flags for instance? Or only large ones?

Have you confirmed they are updated to work with the current game patch ?

Has it always been like this for you, or only since when?

What launcher version do you see? Current is 2021.9  

emeraldemon said: Is there an "empty" or "do nothing" mod I could test?

I have no idea, sorry, I don't use mods - maybe try the User Mods forum on that? Same with the version search question.

emeraldemon said: Where does the launcher put its error logs?

Launcher error logs are here:

• $XDG_DATA_HOME/Paradox Interactive/launcher-v2/logs/ (if $XDG_DATA_HOME is set)
• ~/.local/share/Paradox Interactive/launcher-v2/logs/ (if $XDG_DATA_HOME is not set)

But they will not record anything to do with the game crashing, as the launcher exits when the game starts. The game logs should be here:
/home/user/.paradoxinteractive/Crusader Kings III/  

mactex said: Having the same issue. Any up to date mod enabled causes a crash on launch. Also Linux.

What distro?

Has it always happened, or used to be okay at some point?

Have you checked with the mod authors, maybe they have a problem on Linux only?  

Does that just happen with CK3? Your other games like CK2 and EU4 are okay with mods?

What launcher version do you see? Current is 2021.10

And at what point does this crash occur? While the launcher is starting or running, or while starting or running the game from it?  

FYI , in Ubuntu 21.04 I just subscribed to a mod that changes the game's UI to a Burgundy theme. The game loaded and ran perfectly fine, and the mod was enabled okay.  

That should not be necessary of course! I'm glad it worked out for you.

Saves in the Steam Cloud should still be available. Local save files might have to be moved, but I know nothing about how Proton handles user files.  

vagrantprodigy said: Looks like I already had the folder. Thanks for the idea though.

Linux is case sensitive, is it exactly mod ?