Install gir1.2-mx-2.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-mx-2.0
Description:
GObject introspection data for the libmx library
This package can be used by other packages using the GIRepository format to generate dynamic bindings for libmx.
Homepage: http://www.clutter-project.org/
Version: 1.99.4-1
Section: universe/introspection