Runnin Deepstream on conainer fails to show output on screen and fails pipeline

I am following this blog https://developer.nvidia.com/blog/deploying-models-from-tensorflow-model-zoo-using-deepstream-and-triton-inference-server/
I pulled the container and when I run the Deepstream pipeline it fails.
No protocol specified
** ERROR: main:655: Failed to set pipeline to PAUSED
Quitting
App run failed

DISPLAY=:51.0

** ERROR: main:583: Could not open X Display
Quitting

The only way to run it is to write the output to file
Thanks