I recently installed the Xfce desktop environment on my Fedora 32 Linux system to try out if it's any better than Cinnamon.
Everything else seems to work straight out of the box, but there is one problem. The Xfce panel has "panel items" that can be added or removed, and one of them is "Window Buttons", which apparently should show small buttons of every window I have open on the desktop, so I can click on them to switch between the windows.
Except this "Window Buttons" panel isn't showing anything at all. It takes over two-thirds of the horizontal screen estate of the panel, and all of that is just a blank grey slate. There are no buttons, no text, nothing to click on.
What is going on here and how can I fix this?