I am having this exact same problem. Although I wouldn't wish it on someone else, it's a relief to find that I'm not the only one.

I just got a new laptop with a nicer AMD card (precisely for the purposes of playing this game!), and no matter what I do, none of the characters will move. They're all rigid with their arms at a 45 degree angle. I have reinstalled 3 times without issue and tweaked my graphics settings again and again without resolution. I even tried reinstalling from a different iso I downloaded. No dice.

If anyone has suggestions, I would REALLY appreciate it!