Install gir1.2-mutter-2 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-mutter-2
Description:
GObject introspection data for Mutter
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 GObject introspection data which may be used to generate dynamic bindings.
Version: 3.28.1-1ubuntu1
Section: introspection