This issue has shifted from annoying to complete failure. The sync process cannot get past the files it cannot sync. So updates are not happening.
I have uninstalled and reinstalled CC app to no avail. All the other collaborators have plenty of space available, so it isn't that issue. It appears to be a server error of some kind.
Meanwhile, I have shifted my project over to Google Drive because I cannot rely on CC and I am under a tight deadline.
This may be my fault. I used the mac terminal command-line (sed) to rename a batch of files sitting in my creative cloud folder. This issue showed up then. Of course, just because the errors started after I issued the command does not prove causation.
I have log files saved off. Someone tell me what to do with them so that I can get syncl moving again.