Install gir1.2-polkit-1.0 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-polkit-1.0
Description:
GObject introspection data for PolicyKit
PolicyKit is a toolkit for defining and handling the policy that allows unprivileged processes to speak to privileged processes. . This package contains introspection data for PolicyKit. . It can be used by packages using the GIRepository format to generate dynamic bindings.
Homepage: https://www.freedesktop.org/wiki/Software/polkit/
Version: 0.105-20
Section: introspection