Off the prompt "cuddles."

My lecture on movie musicals says they started with stories about African-Americans and Irish Americans and German Americans etc, leftover from Vaudeville. Then the lecture produces this:

Eventually, Hollywood and movie musicals in general would move away from this kind of ethnic-based narrative, as the heroes of most movie musicals are usually generic "American" types without any ethnic markers.

CAN ANYONE SPOT WHAT IS WRONG WITH THIS SENTENCE?