I recently switched from Kubuntu to Ubuntu Budgie. First I installed Ubuntu Mate (ubuntu-mate-sektop), and a couple of weeks later Ubuntu Budgie (ubuntu-budgie-desktop) on top of that. All installs were done using apt.
So far I really like Budgie: the looks, the speed, the window management possibilities... But there is one major problem: Although I have several apps installed that should show up (Zoom, PCloud, FlameShot, among others) the app tray remains stubbornly empty.
When I add the "AppIndicator Applet" to the bottom panel (which is the only panel I have), which seem to be the recommended one, nothing shows up:
When I remove that and add the "System Tray" applet instead, then only the network icon is shown:
It's probable that the successive installations of different Ubuntu flavors messed up some configuration, as it does not seem to be a common problem and searching the web only turned up old or unrelated posts. I am lost and not sure how to start troubleshooting this. Any hint will be appreciated (which config files to look at, logs to watch...).