Starting Nginx gives org.freedesktop.PolicyKit1 error

I just started to build a ubuntu server on DigitalOcean. When I start the nginx service, it gives the following error: /etc/nginx/sites-enabled$ service nginx start Failed to start nginx.service: The name org.freedesktop.PolicyKit1 was not provided by any .service files I have never seen this before and searching on google seemed the solutions were not quite straightforward.