Wayland

Plover does not currently support Wayland. On some distributions such as Ubuntu or Fedora, Wayland is set as the default.

You might notice that Plover does not seem to write any text, even if everything seems to be working. Or, if you have something like XWayland, Plover only writes into some apps but not others.

Switch back to X
If you are using GNOME, you can follow the Fedora guide on configuring Xorg as the default GNOME session.

Use a Plover fork
If you are using a wlroots based Wayland compositor like Sway, you can use the fork from PR#1461. This requires some developer knowledge such as running Plover from source.

Other solutions
You can also try one of the solutions in Using Plover on unsupported devices, such as using a Stenogotchi.