Has the User added a New Device to the mix of Computer, iPhones or iPads they use ?
This pertains to the iCloud Aspect Only.
I added a new M2 MBA on Friday past running Ventura like the other 2 Computers and 1 iPhone running iOS 16.3.
The annoying iCloud Alert was presented on all other devices.
As for Apple Store issue
1 - Restart in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.
2 - Safe Mode will also eliminate Third Party Software, extensions and drivers from loading. It will only load the Minimum amount of Core Apple Processes to allow the the computer to function at a reduced Level of Performance
3 - Does the issue present in this mode ?
4 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.
Added
If the user whats the latest and greatest versions of macOS all is not lost.
Explore the Apple Trade-In Process where the Value of the exiting device could be used against the cost of a new Apple Computer, iPhone or iPad
Or Shop Refurbished Apple computers at an Apple Reduced Cost
Have used both previously and have been satisfied each time.
Actually, just finished trading in Old M1 MBA for the new M2 MBA and receive a few $$ against the cost of the 512 GB SSD / 16 GB RAM machine and it flys