Partially there is currently a problem in connection with the cancellation reason of the class when hiding the class. We are already working on the corresponding update, so that this will soon be possible again without any problems.
In order to hide the class anyway, please do the following in the meantime:
- Click on «My participants list» - «View participants list» - «Restore class» to restore the class that has already been cancelled.
- Click on «Cancel class» and cancel the class again without adding a reason for cancellation.
- Click on «Hide class in schedule» to hide the class in the timetable again. Alternatively, you can leave the class displayed and skip this step.