iCloud login verification failing and multiple services not syncing

[patent10021]

iCloud login verification failing and multiple services not syncing.

Contacts gone, some notes not syncing displaying some sqlite problems etc.

Something weird is definitely going on.

 

[patent10021]

Here's a new popup. I have never in my life seen this Apple popup before.

 

[patent10021]

It seemed to get fixed on its own.

Still a mystery.