Explain what is wrong?

Question

Ruby on Rails

I started to learn rails, found video tutorials, but there is a very old version of rails and because of this there are errors.
Can you help? What is the error and how to fix it?

Here is the code:

class ItemsController < ApplicationController
  def index
    @items = Item.all
    render text: @items.map { |i| "#{i.name}: #{i.price}"}.join("<br/>")
  end
end

Answer 1

Missing fileapp/views/items/index.html.erb