I have listed a few steps below that should help you load the data on the application.
Another reason that application stays only on the Loading phase and information on the dashboard does not appear is due to poor internet connection or the application is been logged in for the very first time.
If the above steps do not resolve the issue, contact your school district directly to inform them of the issue.
I have provided an article below that will guide you on Syncing Error.
Please let us know if this helps!!!