Install libmutter-2-0 by entering the following commands in the terminal:
sudo apt update sudo apt install libmutter-2-0
window manager library from the Mutter window manager
Mutter is a small window manager, using GTK+ and Clutter to do everything. . Mutter is the clutter-based evolution of Metacity, which, as the author says, is a "Boring window manager for the adult in you. Many window managers are like Marshmallow Froot Loops; Metacity is like Cheerios." . This package contains the window manager shared library, used by mutter itself, and gnome-shell.