I cannot access the Pro exercises after each lesson

Question

Hi. I have upgraded to Pro but when I try to do some coding exercises after each lesson, it won´t allow me saying "you have to complete the previous lessons before you can do this exercise". Althought I have done all of them

Answer 1

You must have to complete lessons in a regular manner, even a pro user can't skip lessons.

Answer 2

But I complete the previous lessons. Still I can't do the exercises. There must be a bug