There is a tutor role that currently does not provide any special functionality and it can only be set via the admin panel. But the role isn't properly supported in the back end and thus can't be used without errors.

To fix this issue, it should either

• A: be no longer possible to set it via the admin panel (as long as it has no special purpose anyway)
• B: or be possible for a tutor to access (for now exactly) the same functionality as a student.

Option B is preferable, since option A would leave dead code (data) for the tutor.
Or alternatively the tutor role could be completely removed in addition to option A.