[Users] Popup notifications not working

[Removed GDPR]

I experienced only 2 popup notifications. Nothing since then.

> I read somewhere about a bug with send-notify and/or the notification
> daemon. Seems fixed in my version of KDE, maybe you need to upgrade
> KDE as the quickest route to the fix.

Thanks for the info. I am using the latest one from the official repos.
Perhaps it would be upgraded with Leap 15.