[SOLVED] No categories selectable in Create new feed

Hi,
I have a problem importing a google calender feed.

Inside the "Create new Feed" form I can't choose a category, because the dropdown is empty.
(I have two active categories).

So, I just get a form error message "This field must be filled"
Or whatever it says in english (I am using the german language).

Any idea?

Thanks for your help in advance,
Thomas [ed. note: charless last edited this post 11 years, 5 months ago.]

Problem solved!

Ok, I just got it. My calendar had no name yet. That seemed to cause the problem.