When I got the errors, I deleted everything from my cloud space - moving it all into Archive. I then cleared out Archive. So I had 0 files in my cloud account and 0 files in the archive.
I left it a few hours, rebooted my PC, and went back in and synced again. I got the same message come up saying sync errors and that I still had the same 10.48 GB in my cloud folder - which is nonsense