Can't compile the student's code. Error: AssertionError('len(cache) must be T_x = 13')

Hello, I am working on assignment 1, I got this error: Cell #5. Can’t compile the student’s code. Error: AssertionError(‘len(cache) must be T_x = 13’). I think my code is right. Any one could help?

Are you still having a problem with this?