Install gir1.2-meta-muffin-0.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-meta-muffin-0.0
Description:
GObject introspection data for Muffin
Muffin is a small window manager performing compositing as well based on GTK+ and Clutter and used in desktop environment such as Cinnamon. . It is fairly extensible by the mean of plugins, providing new or customized visual effects as well as a flexibility in the behavior of the window manager. . This package contains the GObject introspection data which may be used to generate dynamic bindings.
Homepage: http://cinnamon.linuxmint.com/
Version: 3.6.0-1
Section: universe/introspection