Desktop/Documents can't be opened because the original item can't be found

1. Desktop is not active on my main user: I can't use it, save something here, it's empty - only background image
2. Desktop and Documents folders disappeared and I can't find any info or any file from these folders through Spotlight or manually
3. When I tried to open it from Finder there was a mistake "Desktop can't be opened because the original item can't be found"
4. I disabled and deleted these non-working folders from Finder and tried to show them in Sidebar menu but there were nothing (see attached screenshot from first post)
5. I can't turn on "Desktop & Documents folders" in System Preferences > iCloud > iCloud Drive (Options) > Desktop & Documents Folders. When I check it, then close it, reopened it and its unchecked (no synchronizing I guess, some fking iCloud mistake)
6. I can't use my Desktop in the main user because THERE ARE NO desktop & documents folders in the whole system. Desktop is empty, I don't see them in Finder, I can't check it in Finders preferences because I see 2 minuses in empty folders (attached picture)
7. I see only 2 folders "Desktop" and "Documents" in my iCloud Drive dated 2nd April and containing 1 or 2 files (almost nothing). The problem first appeared several (2-4) days ago.
8. I can't run my Mac in Safe Mode (when I click Shift while turning off the computer it moves me to user selection, I'm logging and then just black screen.
9. I tried to use First Aid Disk Utility in Recovery Mode and there was a mistake "The volume /dev/disk0s2 could not be verified completely"

I don't have local Apple Store in my country.

These settings are disabled now. When I’m trying to enable it and quit settings and back - they are disabled without tick

No, did nothing. In the local service told me that can't help me, they can't find these folders in the system.

Also I can't run the system in safe mood, it doesn't work