New Instance just hangs

I have created a new instance based on this documentation:
https://github.com/WPO-Foundation/webpagetest/blob/master/docs/EC2/Server%20AMI.md

However the new instance just hangs:
e.g. http://52.210.130.253/result/160912_RK_2/

Any advice?

If i got to http://52.210.130.253/install/ it says no agents are connected. Can anyone help?

Anything interesting in the WPT web server error logs?