Hi Jean-Michel,
I am on Moodle 2.8.
My students cannot access the next activity.
1) I did ensure that the students were able to see gradebook, but still not working.
2) I have a lesson, then a certificate of completion, only available once the lesson has been completed.
3) I have tested this and even though I have successfully completed the lesson with "Congratulations" appearing at the end, I still cannot access the certificate of completion activity. Please assist.