Apple ID

This may be your problem. Apple is aware of it, but there is no definitive solution yet.

But, note that some have solved the problem by signing out of iCloud, restarting their devices, and signing back in. 

Update Apple ID settings iphone https://discussions.apple.com/thread/251180098

Updating Apple ID Settings https://discussions.apple.com/thread/251076026

Getting a message to Update Apple ID Settings on iPhone, iPad, or Mac? https://appletoolbox.com/update-apple-id-settings-on-iphone-ipad-or-mac-after-changing-your-password/

How Fix Update Apple ID Settings If It Won’t Go Away https://techzillo.com/update-apple-id-settings/

Update Apple ID Settings On iPhone? What It Means & What To Do! https://www.payetteforward.com/update-apple-id-settings-on-iphone-what-it-means-what-to-do/

You also may want to use the support options below in dealing with your problem.

Get a call from Apple support to help solve your problem using this

link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

Apple ID Support https://support.apple.com/apple-id

Apple ID account security for country-specific and region-specific help https://support.apple.com/en-us/HT204169

Get Support: We’re here to help https://getsupport.apple.com/. Go through the options to find the best support option.

If you have changed your ID or password, have you followed the steps in this article?

What to do after you change your Apple ID or password - Apple Support.      

If you were syncing photos with iCloud, have you allowed enough time for the photos to sync back? The photos sync is very, very slow. It may take a couple of days to complete the sync.

Did you see my post above--about the problem you started with?

You are welcome.