Install gir1.2-modemmanager-1.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-modemmanager-1.0
Description:
GObject introspection data for modemmanager
ModemManager is a DBus-activated daemon which controls mobile broadband (2G/3G/4G) devices and connections. Whether built-in devices, USB dongles, Bluetooth-paired telephones or professional RS232/USB devices with external power supplies, ModemManager is able to prepare and configure the modems and setup connections with them. . This package contains introspection data for the libmm-glib library.
Homepage: https://www.freedesktop.org/wiki/Software/ModemManager/
Version: 1.6.8-2ubuntu1
Section: introspection