preview, numbers can't open/save documents???
Hello
On my MacBook Air, mid 2012, MacOS 10.15.1:
With numbers, I can't save documents. It says "cannot read document" when I hit cmd-S
I can't open or save documents.
With preview, I can't even open PDF-files...
They're either on the desktop, or in the downloads-folder.
This seems to be a bit serious.
Thanks very much...
MacBook Air 13", macOS 10.15