Install libnm-gtk-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libnm-gtk-dev
Description:
library for wireless and mobile dialogs - development files
The libnm-gtk library provides Gtk+ dialogs for NetworkManager. . This package contains the development files.
Homepage: https://www.gnome.org/projects/NetworkManager/
Version: 1.8.10-2ubuntu1
Section: libdevel