Install gir1.2-networkmanager-1.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-networkmanager-1.0
Description:
GObject introspection data for the libnm-glib/libnm-util library
NetworkManager is a system network service that manages your network devices and connections, attempting to keep active network connectivity when available. It manages ethernet, WiFi, mobile broadband (WWAN), and PPPoE devices, and provides VPN integration with a variety of different VPN services. . This package contains introspection data for NetworkManager using libnm-glib/libnm-util. . It can be used by packages using the GIRepository format to generate dynamic bindings.
Homepage: https://wiki.gnome.org/Projects/NetworkManager
Version: 1.10.6-2ubuntu1
Section: introspection