Install gir1.2-cvc-1.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-cvc-1.0
Description:
Introspection data for Cinnamon pulseaudio abstraction
This package contains the introspection data for Cinnamon pulseaudio abstraction.
Homepage: http://cinnamon.linuxmint.com/
Version: 3.6.2-2
Section: universe/introspection