i had this problem a while back, i don't remember exactly what i did to solve it, but i remember deleting stuff from the "content" folder but i'm not sure if it was the content0, content1,content2 or the patch0 and patch1, then i ran the "verify/fix" option on GoG and the folders i deleted were replaced by new uncorrupted ones the game runs fine since hope this helps if you haven't already found a solution