Install gir1.2-avahi-0.6 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-avahi-0.6
Description:
GObject introspection data for Avahi
This package contains introspection data for Avahi using libavahi-gobject. . It can be used by packages using the GIRepository format to generate dynamic bindings.
Homepage: http://avahi.org/
Version: 0.7-3.1ubuntu1
Section: introspection