My Windows 10 does not login to MS account properly

Question

My one Windows 10 PC has an MS ACcount I login with.
But in settings it show "Rewards (login") so it does not login properly.
Also when I login to my MS account on web this one PC is not showing in the device list.
My other Windows 10 PC and the two Windows 11 PCs all show up.
And they show the reward info in settings.
Is there some setting that prevents my PC from properly logging in?
I have used some tweak app to prevent privacy and telemetry.
But that is on all 4 PCs, so why is it only this one that is not login in?
And will this prevent me from getting updates one more year (live in the EEC area)?

Answer 1

I re-registered apps (found in another thread with this commands):

Get-AppXPackage -AllUsers -Name windows.immersivecontrolpanel | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml” -Verbose}

Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

Now I get the login box to the MS account, but when I login I get:

"Oops, something went wring. It probebly our fault"

So what do I do then? I still can't login to my MS account :-(