'The file "Untitled" couldn't be opened.'
I keep on getting this message when I try to open Keynotes and Pages documents: 'The file “Untitled” couldn’t be opened.' Now I can't open my recent documents, and I can't save new ones either. I am pretty sure it has something to do with iCloud, but it is very annoying because I can't access any documents (I can access older ones). It has happened before, and I tried doing what some people suggested: System Preferences > iCloud, and then unchecking the iCloud tab and then checking it again. That worked the first time, but it hasn't worked this time.
Relevant info:
Macbook Pro (retina dispay, 13 inches, early 2015)
Running OS X El Capitan version 10.11.5
Newest versions of Pages and Keynote.
MacBook Pro with Retina display, OS X El Capitan (10.11.5)