I've tested every mod I have independently and Diplomacy seems to make my game crash every time I start the game. It doesn't get past the first loading screen without telling me:
"The application faced a problem. We need to collect necessary files to fix this problem. Would you like to upload these files now?"
I'm running the game on 1.1, and I've tried running it on 1.0.3, and it's all the same.
Strangely, I ran the game with the same version and mod configurations for a good week or so.
After I received a notification from Bannerlord saying that if I ran the game that I might lose progress I for some reason thought it would be a good idea to verify the integrity of my game cache to make sure stuff lined up.
After reinstalling the game, it seems Diplomacy is the only one facing some sort of compatibility issue.
I would seriously appreciate some help!