For some reason I cannot create a Document Library, as the option for this is gone (for example via Site Actions -> View All Site Content -> Create).
The option in the red circle is gone. And if I choose Site Actions -> New Document Library, I just get a blank dialog:
Edit: It does not work from Site Actions -> Manage Content and Structure either.
How can I get the possibility to create document libraries back?
How can it not be there? Is there a feature in the parent site collection that should be activated? (the site in question is located at xxx/sites/SiteName)