I downloaded 1 mod (enhanced nude bodies). Placed it in the data folder. It was 1 file in several subfolders. I started the game and got this data mismatch error. i deleted the modfile. Started the game again, same error.
Checked File list. It listed 4 files in the Localization folder. Which i didnt alter in any way, i think.

This is what i tried:
I started the game anyway. All text in the loading screen and in the menu said: unknown error.
I verified game files. All verified. Same error.
I deleted the localization folder. Verified files. It downloaded/installed the files. Same error. Text in game was fixed now. I played for 2 hours. All seemed good.

This error worries me. I may run into issues. It seems so weird.
I added a file, then deleted it, now this error keeps popping up...Or maybe it is only an error you just get once you have altered the files in any way? and its no big deal? I didnt really alter anything.

btw: i dont have a baldurs gate 3 folder in appdata/larianstudios? Where is my save data? Did they change the location? I like to backup my saves.

Anyone any idea's plz? Re-installing will take so loooong.