Install gir1.2-gtk-vnc-2.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-gtk-vnc-2.0
Description:
GObject introspection data for GTK-VNC
This package contains introspection data for the GTK-VNC library. . It is built using coroutines, allowing it to be completely asynchronous while remaining single threaded. It supports RFB protocols 3.3 through 3.8 and the VeNCrypt authentication extension providing SSL/TLS encryption with x509 certificate authentication. . It can be used by packages using the GIRepository format to generate dynamic bindings.
Homepage: https://wiki.gnome.org/Projects/gtk-vnc
Version: 0.7.2-1
Section: universe/introspection