I have this same Problem:
How long have you been seeing this error message? What were you trying to do when you get this message.
Try restarting your computer. Restart, not shutdown and startup again.
Message: “Server error: We’re working to resolve an issue that prevents us from completing your request. Try again later. (-12)”
https://support.norton.com/sp/en/us/home/current/solutions/v130153139