$ sudo apt-get update
$ sudo apt-get install razorqt-policykit-agent 

razorqt-policykit-agent is installed in your system.

Make ensure the razorqt-policykit-agent package were installed using the commands given below,

$ sudo dpkg-query -l | grep razorqt-policykit-agent *

You will get with razorqt-policykit-agent package name, version, architecture and description in a table

razorqt-policykit-agent package basic information: