Files den?t exist

Hello,

Trying to open a pages document I created last week. I get the message "The document “.....” could not be opened. The file doesn’t exist.

The weird thing is I can open the document in My files on my iPhone and on my iPad. They are all stored in my iCloud, so they DO exist.

To edit the document, which I urgently need, I want to work on my Mac. Anybody else has the same problem?

iCloud Drive and Internet, all turned on. Haven't changes any passwords or other things.

I am hoping I can get a quick answer here to help me solve my problem.

Thank you very much.