Q: I cleverly deleted the content of my "Mobile Documents" Folder...

...in the library and even after some folders were recreated (for example by Pages, Numbers etc.), I cannot upload any documents, regardless of the application used (the app will show "wait", but nothing happens). Same problem on my iOS devices. The synchronization with icloud works for everything else, like Mail, Reminders and so on.

If I try to access the beta application of Pages/Numbers/Keynote on the icloud website it crashes and I need to login again...

Does anyone know how to solve this problem? Do I have to recreate some files?