I've been having the same problem for over a week now. Wondering if they actually are working on it and if so why is it taking so long! Tried to contact them as well to no avail!
Some users on this site have reported that logging out of the app and logging back in has resolved the issue. You should also make sure you have the most up to date version of the mobile app.
I am also having a lot of users of that app that are running into a "Problem Syncing" error. I will advise them to make sure the app is completely up to date and to log out and back in. Will report back if it worked out for us.
This finally worked for me as well. I tried all these steps last week and it didnt work, just tried it and now i'm good to go. Thank you!
We apologize for the inconvenience. If you still having syncing issues, please notify your child's campus or district. They will be able to submit a support case with PowerSchool to allow us to identify the issue as we continue working with our developers.