If you try to quit the course from the main university page, the button works, but if you try to quick via the degree page, that button does nothing.

Interesting catch!

<button class="btn btn-danger leaveCourseBtn bg-danger" courseid="46" title="Leave Course" data-bs-toggle="modal" data-bs-target="#cancelCourseModal">Leave Course</button>

and

<button class="btn btn-danger leaveCourseBtn bg-danger" courseid="46" title="Leave Course">Leave Course</button>

Thanks for the report, a fix is deploying now