After `xfwm4 --replace` Window Manager & Tweaks not showing up anymore

I have a weird issue where my title bar and colored window borders are gone. As suggested in this GitHub issue I did a xfwm4 --replace which seems to have been catastrophic and leading to a series of issues:

  • I cannot open my Window Manager and Window Manager Tweaks (both from System Tools) anymore (clicking on them does not show the window).
  • I have only one desktop that is visible in the panel (used to be 4)
  • alt+tab does not work anymore
  • opening second window and then switching focus back to the first one, leaves the second window on top. E.g. opening a terminal after having a browser open, keeps the terminal on top, no matter what.

Needless to say, that is totally broken and Qubes basically not usable anymore. How can I try to recover from this?

I’m on Xfce 4.14 on Qubes 4.1.2 and relatively new to Qubes.

Especially the last point on my list is a crazy nuisance. I have a maximized browser window that occupies the full screen. Switching between that one and any other program is currently only possible by switching off the qube in the Qubes manager :dizzy_face: :woozy_face: