[Wayland - Kubuntu 24.04] GPU error 8704 on app startup, unable to connect to dbus

Version 3.4.8-linux1.

Github Desktop has stopped launching properly under Wayland (still works just fine with X11 on the same machine). No window appears but there is an icon on the taskbar (clicking the icon does nothing). When the app starts, I get the following errors in the console (in order):
* `[2:1218/234944.495683:ERROR:bus.cc(407)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory`
* `LaunchProcess: failed to execvp: xdg-settings`
* `[54:1218/234944.817475:ERROR:gbm_pixmap_wayland.cc(82)] Cannot create bo with format= RGBA_8888 and usage=SCANOUT`
* `[54:1218/234944.817548:ERROR:gbm_pixmap_wayland.cc(82)] Cannot create bo with format= RGBA_8888 and usage=GPU_READ`
* `[54:1218/234944.817608:ERROR:shared_image_factory.cc(999)] CreateSharedImage: could not create backing.`
* `[54:1218/234944.817704:ERROR:shared_image_factory.cc(765)] DestroySharedImage: Could not find shared image mailbox`
* `[54:1218/234944.817790:ERROR:gpu_service_impl.cc(1124)] Exiting GPU process because some drivers can't recover from errors. GPU process will restart shortly.`
* `[2:1218/234356.689364:ERROR:gpu_process_host.cc(997)] GPU process exited unexpectedly: exit_code=8704`

These errors are thrown three times before it gives up and hangs, and they persist after several restarts/reinstalls. I didn't find any log files in `$HOME/.var/app/io.github.shiftey.Desktop/config/GitHub\ Desktop/logs/`. Launching from the pinned taskbar icon results in the same issue; its link is configured to run `run --branch=stable --arch=x86_64 --command=start-github-desktop --file-forwarding io.github.shiftey.Desktop @@u %U @@`.

Console output:

Taskbar icon: