Bug at intermediate python lesson 4.1

Question

Every time i solve the practice4.2 it doesn't let me progress more.

Answer 1

Hi! and before that you were able to open the practice 2.2 and 3.2? if so, how?

Answer 2

For some reason it's solved now maybe it was an internet problem thanks for the answers <3

Answer 3

Completes 4.1 fully, got a green tick?
5.1 is not unlocked ?
Mailto : [e-mail]

Answer 4

I was printing 'Not found'
instead of 'Not Found'