Arabic 3 for Britanic English speakers - Not loading

When I click on the official course Arabic 3 (having completed course 1 & 2), the Arabic 3 screen appears, however, I cannot see any of the chapters within the course. Clicking the ‘words & phrases’ button produces the error:

“Error, sorry, there was an error loading the session!”

Can you please guide me how to get to Arabic 3 course on my mobile app. I tested the course on website & it appears to work fine.

Best,