Trouble installing Rasa X with Ephemeral script

I am trying to install Rasa X using the Rasa Ephemeral Installer on a brand new Ubuntu AWS instance (I also experienced the same issue on a local computer). When I run, I get this following message, which I presume is a fatal error.

The connection to the server localhost:8080 was refused - did you specify the right host or port?

Any idea what could be causing this?