Having the same problem even with part 1 of the lesson ("What you'll be building"). The little gear gif just spins. Having the same problem among multiple browsers, OS and machines. Incognito mode did jack. Halp.
Is there a question in the terminal? (that's the black box on the right hand side)
Yeah, for part 1 it just shows "What's your first name?" but doesn't print any of the other questions in the example code.
It is waiting for you to type in an answer and then press return/enter.
Thaaaat would make sense. Thanks!