[Hosting] After migrate to WPMU Learndash plugin is not working properly.

After I move my site here they got some issue, some pages didn’t load fine they’re at the old host.
My website is about online courses, many pages is workinf fine but I found out the quiz page is not work.
Please look here:
https://++++++++++-academy.wpmudev.host/quizzes/bt-coach-exam-august-2019/