Client error when running docker pull

Trying to install the client.

Get the same issue on the server computer and when I try on a different local computer.

$ docker pull bluecherrydvr/bluecherry-client
Using default tag: latest
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post “http://%2Fvar%2Frun%2Fdocker.sock/v1.24/images/create?fromImage=bluecherrydvr%2Fbluecherry-client&tag=latest”: dial unix /var/run/docker.sock: connect: permission denied

Docker does not run as root without modifications. Run this as root or with sudo.