XF 2.2 "Push Notifications Blocked" message

[rc211e]

One of our members has been using Push notifications successfully but tonight reported getting message

"Push notifications blocked" (greyed out)

when he tried to save preferences.

Member has been using Edge app on Windows and Firefox app on Android successfully for about 2 weeks.

Now "blocked" message appears on both devices.

Tried uninstalling and reinstalling app with no change

Anyone able to offer ideas on resolving please?

 

[rc211e]

Appears to be in member's browser settings. Admin has successfully logged in as member in Chrome app and Edge app and enabled Push without issues.