Can't the mod be applied to the game right now?

I am a single player who plays only in custom mode with randomly adjusted tech trees of several civilizations.
After downloading the Kings of the West DLC, the game crashes when using the mod.
I am not very interested in achieving campaign achievements, and I am used to using mods, so I cannot play with existing data mods.
If it keeps in this state, I cannot play the game. Does the game turn off if anyone other than me uses the mod?