Install libmuffin0 by entering the following commands in the terminal:
sudo apt update sudo apt install libmuffin0
lightweight window and compositing manager (shared library)
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 window manager shared library, used by muffin itself, and Cinnamon.