I understand how frustrating it could be. If you're able to see your files at: https://assets.adobe.com/cloud-documents, I would request you to please try these steps-
Sign out and sign back into Creative Cloud Desktop.End all Adobe processes from Task Manager (Windows) or Activity Monitor (OS X)Reboot the computer
If the above steps don't help, please try to open the file from another machine if that is possible.
Let us know if that helps.