The reason for this bug is that before revision 636 [1], the gradebook didn't deploy course worksheets to new sections, and the Hide/Unhide view tries to get a key that was never deployed. Maybe we just need to double check that the deployedKey exists in the section activities.
The reason for this bug is that before revision 636 [1], the gradebook didn't deploy course worksheets to new sections, and the Hide/Unhide view tries to get a key that was never deployed. Maybe we just need to double check that the deployedKey exists in the section activities.