The error appears when you enroll several Students in Classes and Modules at once from the Students list: 1. Open Students > Students List, view Students per Educational Program. 2. Tick the Students to enroll. 3. Click Actions > Enroll Classes - Modules.
The full article is available to signed-in Classter users.
Sign in with your Classter account — if you are already signed in to your Classter Portal you will not be asked for credentials.
Sign in with ClassterIntegration partners only — external partners without a Classter account.
Classter staff and customers: use Sign in with Classter above.
Partner sign-in with Microsoft