Problem with tutorial

<%- if @topic_view.topic.tags.present? %>
<%= t 'js.tagging.tags' %>: <%- @topic_view.topic.tags.each do |t| %> <%= t %> <%- end %>
<% end %>

SS version 4

I’m following the tutorial exactly and I can’t get lesson 1 to work. I put a simple hello world text into the like it said to and when I navigate to localhost/public it just shows a blank page.

It’s possible the tutorial isn’t up to date.

Anyone have any ideas?