Compositor

The Window Switcher installation is broken, resources are missing.

Problem:
When using Alt+Tab to switch window:

The Window Switcher installation is broken, resources are missing. Contact your distribution about this.

In addition, the desktop effects are not working.

Possible solution:
Go to KDE systemsettings > Hardware > Display and Monitor > Compositor > Uncheck "Enable compositor at start up".

$ qdbus org.kde.KWin /KWin supportInformation

Compositing
===========
Compositing is active
Compositing Type: OpenGL

#8937

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