I had a similar error "error 60, line 649". After I made sure i had the .jsx file in the correct 30ish kilobyte format, I have found that using the script completely crashes (edit: and closes) photoshop as opposed to giving the aforementioned error... halp pls Erika.... If i have to manually export 30-40 layers and crop them, i will throw myself out the window
edit: im using photoshop CC2015
double edit: for the record, i jumped on the discord server and everyone was very helpful. it turns out that I had disabled java updates which required a java reinstall and PC restart (in addition to having the correct script rather than the webpage saved.