If your course progress is missing:
a) Please ensure that you sign into the account correctly because there will be 3 different accounts if you sign into the account via email/password, Google, and Facebook.
b) If the account has no problem, please click”ME >> Backup“.

If the review data is missing and the course progress is normal:
Please click “Me >> profile photo>> setting button on the right-up corner>>recover review progress” .