"check system update" does not work

Have a nice day,

My wife and I we both do own a FairPhone 3, my wife a 3+.
Both on the same /e/OS (latest)
When I check for system updates on my phone the answer is “no updates available”
On my wife’s, “can’t check for updates, check your internet connection try later again”.
But, 5 seconds ago I updated her phones apps with App’s, F-Droid and Aurora-store perfectly.
What’s going on?

Regards, Jan

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone