@SiSi Thank you so much for your reply. I sent them screenshots this morning after your reply and voila my problem fixed. Before that, I just wrote them an email that I was facing this issue, but nothing happened.  Thank you again.  ... View more

I am also facing the same issue and I tried contacting support through email but so far no answer and I am still stuck with a pre-requisite lesson. I am unable to move forward in my course because of that. Kindly let me know if your issue is solved. If yes please let me know how it got fixed.  ... View more