iCloud Desktop - Character Limitation

[paal (P. Boersting)]

Yes that is a bad error message. No help at all.

@dave6

The other fun discovery is that once you’ve turned on iCloud desktop sync, when you turn it off your desktop is suddenly empty. Your iCloud drive contains a “Desktop” folder whose contents you can move back to your local folder, and there is a warning when you turn off syncing. but it’s not a terribly friendly way to behave.

You can find a long discussion about that here: iCloud Drive ate my Documents folder