@AvalancheMaster, Hello! Sorry for late reply.
Since the whole script is a huge recorded action, it is super picky. The image needs to be pretty much exact as it came to work flawlessly. Off the top of my head, remember, all the layers have to be invisible, and the Grey Grid should be the one 'selected'. Make sure there are not 2 duplicate layers. When you paste a layer in, you need to make sure you rename it correctly, delete the old one, and put it in the old ones spot.
It shouldn't be a version error either, I can say for sure; unless it's a cause of the version of Windows which I doubt. Anyways, I will try to rerun it to refresh my memory.
Let me know if you figured it out or not since last post.