I can't reproduce this problem, but those warnings ("statlist.get_stored_body_image() called directly") are things I put in and shouldn't be getting called unless CharacterClass.gd isn't getting properly overridden by the mod (which maybe would also explain the other errors?). Unfortunately I don't really have any ideas on how to fix this if I can't reproduce it, it's possibly related to windows but I don't see why that would be a problem.