Comment 6 for bug 1779663

> Could not get owner of name 'org.kde.StatusNotifierWatcher': no such name

Oh, it looks like I was wrong then.

There are two ways to get icons in the panel: via indicator-application and via the old X11 tray.

The indicator-based tray is default if you have the standard panel configuration (with indicator-applet added to the panel). But it looks like you don’t have it, so the X11 tray is used instead.

You can try adding indicator-applet to the panel and see if this helps.