Opening course dashboard causes error message to appear

[Kooper16]

Describe the bug

Opening the dashboard of a course in Student View (or as a Student) generates an error message that reads

Unknown lecture unit type: de.tum.cit.aet.artemis.lecture.domain.ExerciseUnit

To Reproduce

1. Go to 'Course Overview'
2. Click on a course with a dashboard
3. Red error message in the top right

Expected behavior

No error message.

Screenshots

No response

Which version of Artemis are you seeing the problem on?

7.5.3

What browsers are you seeing the problem on?

Firefox

Additional context

This error appeared after upgrading from Artemis 7.5.2 to 7.5.3.

Relevant log output

No response

[Strohgelaender]

@ole-ve Probally related to #9313?

[krusche]

This is already fixed. The bugfix will be deployed soon