Server error occurred error when accessing the delegation page

Group Gator's services scopes have changed since you originally authorized them.  As a result, you should be requested to re-authorize the application with its new required permissions. You’ll need to remove Group Gator’s permission then reauthorize.

To remove permission and reauthorize:

1. Navigate to this page: https://myaccount.google.com/permissions
2. Click the Group Gator app.
3. Click Remove.
4. Then, navigate here and re-authorize the Group Gator Service using your Super admin account.

Once you've done this, the Delegation Service should be available once again.