Install gir1.2-cinnamondesktop-3.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-cinnamondesktop-3.0
Description:
Introspection data for CinnamonDesktop
This package contains the introspection data for CinnamonDesktop.
Homepage: http://cinnamon.linuxmint.com/
Version: 3.6.2-2
Section: universe/introspection