I want to add a browsing function with ruby on rails

It's been about two weeks since I started programming.

NoMethodError in Todolists#index Showing /home/vagrant/work/sample_app/app/views/todolists/index.html.erb where line #2 raised:

undefined method `each' for nil:NilClass Extracted source (around line #2): 1NoMethodError in Todolists#index Showing /home/vagrant/work/sample_app/app/views/todolists/index.html.erb where line #2 raised:

undefined method `each' for nil:NilClass Extracted source (around line #2 1

Post list </ h1> ２　<% @lists.each do |list| %>← This is an error 3

Title </ p> ４ <%= list.title %> ５　<% end %>

I get an error like this and I don't know how to solve it.

I copied the text because I don't understand it too much, but it has not been passed.

Where should I review it?

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