Lesson glitch?

Question

I think this is the third day and I still cant get pass through the for loops lesson in python. It always says completed at the end of the lesson but there is no ‘check’ mark indicating that the lesson has completed and I can’t proceed to the next lesson
Has anyone encountered the same problem?

Answer 1

Just completed that lesson. No problems. The answer to the last question is 4.

However, it looks like this person has the same issue:
https://www.sololearn.com/discuss/3218647/?ref=app