TypeError: exceptions must derive from BaseException

[zdarova69]

When I ran script nothing happened. The program has been stuck here, and ended with: TypeError: exceptions must derive from BaseException

[AWangji]

When I ran script nothing happened. The program has been stuck here, and ended with: TypeError: exceptions must derive from BaseException

I also met this problem. Have you resolved it?

[rlleshi]

Well just raise an exception in that exact line, like so: raise Exception('Generator must exist!')

But the problem is that you haven't extracted the stuff from this step properly inside a checkpoints folder.