Install gir1.2-spiceclientgtk-3.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-spiceclientgtk-3.0
Description:
GTK3 widget for SPICE clients (GObject-Introspection)
libspice-gtk3 provides gtk3 widget to show spice display and accept user input. . This package contains the GObject-introspection data in binary typelib format.
Homepage: http://www.spice-space.org/
Version: 0.34-1.1build1
Section: universe/introspection