Entering the command "LC_ALL=C systemsettings5" in a terminal gives the following output: The desktop entry file "/usr/share/applications/Home.desktop" has Type= "Link" instead of "Application" or "Service" kf5.kservice.sycoca: Invalid Service : "/usr/share/applications/Home.desktop" The desktop entry file "/usr/share/applications/org.gnome.ChromeGnomeShell.desktop" has Type= "Application" but no Exec line kf5.kservice.sycoca: Invalid Service : "/usr/share/applications/org.gnome.ChromeGnomeShell.desktop"
It so happened that starting systemsettings caused kded to update its cache of .desktop files 2 don't follow the .desktop specification in the ways described. They should be fixed, but niether of them are shipped by KDE
OK thanks. I will enter a bug report in openSUSE.
Apparently things have changed, so the problem in openSUSE is gone already.