Please don't post screenshots of your error. At the very least paste your error messages in text format.
Also, your error is very clearly stated in your screen---you are having x11 connectivity issues. In other words, you seem to be running headless without a GUI environment, whereas the demo is trying to show something on screen.
Please don't post screenshots of your error. At the very least paste your error messages in text format.
Also, your error is very clearly stated in your screen---you are having x11 connectivity issues. In other words, you seem to be running headless without a GUI environment, whereas the demo is trying to show something on screen.