Steps to reproduce:
1. Log in to Dashboard
2. Click '+Create'
3. Select root and click '+Create'
4. Select fe. Folder
5. Add values & click 'Confirm'

Actual result:
After clicking 'confirm' blank page occurs. It is still possible to click 'Cancel' but clicking 'Confirm' doesnt work. Error message then shows in Dashboard.

Expected result:
Content is created properly