Install gir1.2-matedesktop-2.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-matedesktop-2.0
Description:
GObject introspection data for the libmate-desktop library
The MATE component mate-desktop contains the libmate-desktop library, the mate-about program, as well as some desktop-wide documents. . The libmate-desktop library provides an API shared by several applications on the desktop, but that cannot live in the platform for various reasons. . This package contains introspection data for the library. . It can be used by packages using the GIRepository format to generate dynamic bindings.
Homepage: http://www.mate-desktop.org/
Version: 1.20.1-2ubuntu1
Section: universe/introspection