I have been stuck for the past 2 hours to trying to figure out this. After inserting a question page in the Lesson Activity, once the question is submitted, (whether the answer is wrong or correct) on hitting the continue button I come upon an error:
I have noticed that previous lessons that worked fine don't seem to be working as well.
The version we are on is 3.10. Kindly someone assist before I bang the laptop on my head