Preview rails app not working

Hi there, following rails tutorial book, I’m trying to preview simple hello_app, but I get error saying in browser " No application seems to be running here!"

Url seems to be correct, as username and workspace names are correct too.

Any idea?

Server process seems to be up and running, see screenshot2019-05-23

[solved]
rails s -b $IP -p $PORT made the trick :slight_smile: