I think the original poster has the same issue as me - no files will upload to Cloud Documents (https://assets.adobe.com/cloud-documents).
The Synched folder still requires you to have a copy on your local machine and synch them to the Creative Cloud Synch Files. However, with the Cloud Documents Folder, it should be possible to store files in the cloud space only, to save local disk space.Quite bizarre that browsing through years of posts, there doesn't seem to be a valid solution. The "Correct Answer by Adorobat" further up in this thread also links to a post thread from 2018 with no solution... so no idea why an employee would post that.