vertification failed

I think this what is happening. This problem is being worked on by Apple currently. Some have been able to fix the problem by signing out of and back into to iCloud.com. The links below may not be much help, but you may want to try some of the possible solutions given.

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/

Fix Keep Asking Update Apple ID Settings Issue on iPhone https://medium.com/@shshxiaojing1/fix-keep-asking-update-apple-id-settings-issue-on-iphone-39fa1c3c47fe

Some things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone, iPad, or iPod touch         

Try a forced restart.

Reset Device.      

If necessary

Hard reset.        

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Backup - Restore your device from an iCloud or iTunes backup.