I have a problem very similar to What could cause iCloud Drive to refuse to sync Desktop & Documents?. I can't get the Preferences -> Apple ID -> iCloud Drive , Options ... -> "Desktop and Documents Folders" check box to stick. I check it and there is a spinning wheel and the text "Setting up" and then I press done. But when I go back again it is still not checked.
I have a new MacBook Air M1 and with the latests 11.1 OSX. I have just started it and enabled iCloud.
When I look in the console and filter on bird, I get the following error messages:
default 16:46:30.160768+0100 bird DSMoveSyncedDocumentsAndDesktopToHomeDirectory_V1 <private> -> (null),<private> (0)
error 16:46:30.160867+0100 kernel Sandbox: bird(969) deny(1) file-write-create /Users/oskar/.DS_BarrierSync
default 16:46:30.168781+0100 bird "The connection to ACDAccountStore was invalidated."
fault 16:46:30.195447+0100 bird [CRIT] Failed to move synced Documents to Home Directory: Error Domain=NSPOSIXErrorDomain Code=66 UserInfo={NSFilePath=<private>}
error 16:46:30.198179+0100 bird [ERROR] Failed to apply sync policy: -1 for folder type: 2, error: Error Domain=NSPOSIXErrorDomain Code=66 UserInfo={NSFilePath=<private>}
fault 16:46:30.219949+0100 bird [CRIT] UNREACHABLE: there are still XPC clients around: <private>
I have tried removing the Documents folder that seems to help for some but I made no difference. Any ideas?