Sure thing! It's CC version 22.214.171.1244, the error message doesn't state anything more than " There was a problem syncing som files", no reason... (The reason would be that the file is deleted both on desktop and cloud, so nothing to sync. But why does it try to sync it anyway?!)
Oh, one thing I can add to the description, I am running Mac OS Mojave (latest beta), but I have had the same problem in High Sierra just a couple of months back with some other files. That problem just solved itself automagically after som weeks. Still annoying to see those error messages.