Desktop/Documents can't be opened because the original item can't be found
macOS Mojave 10.14.6
Desktop became empty and non-usable, only background image. When I tried to launch it from Finder there was a mistake "Desktop can't be opened because the original item can't be found". The same issue with "Documents" folder.
Tried to reboot in safe mode - black screen, nothing happened after log-in.
Tried to delete Desktop & Documents from favorites and can't add it again. I just don't see these folders in the Sidebar list.