Install gir1.2-template-1.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-template-1.0
Description:
GObject introspection data for template-glib
This package contains GObject introspection information. . It can be used by packages using the GIRepository format to generate dynamic bindings.
Homepage: https://people.gnome.org/~chergert/docs/template-glib/
Version: 3.28.0-1
Section: universe/introspection