Unable to sync files.... "Due to server ...

I have suddenly begun to receive the following message on my Windows 10 machine:

Unable to sync some files due to server error

I have seen lots of similar posts but so far no solutions. Is this just a known bug and no solution at this time?

I also tried looking for the coresync log file in the location suggested but that location must not have been on a windows 10. Where can I find the log files on a windows 10 machine?