I also had a mismatch warning related to the script extender. I deleted script extender and enhanced ui, which were the only mods I had left, but the error remained after that. But the game had also become unplayable, apart from the message. I had to delete all BG3 files from the local steam folder and appdata folder and reload the game and reinstall afresh to get rid of this message and re-enable the gameplay.
Last edited by ldo58; 02/03/24 07:51 PM.