Install libpolkit-backend-1-0 by entering the following commands in the terminal:
sudo apt update sudo apt install libpolkit-backend-1-0
Description:
PolicyKit backend API
PolicyKit is a toolkit for defining and handling the policy that allows unprivileged processes to speak to privileged processes. . This package contains a library for implementing authentication backends.
Homepage: https://www.freedesktop.org/wiki/Software/polkit/
Version: 0.105-20
Section: libs