NoMethodError in Registrations#index

Showing /home/deploy/raise365-server/app/views/devise/registrations/index.html.erb where line #3 raised:

undefined method `each' for nil:NilClass

Extracted source (around line #3):

1: <div class="well">
2:   <ul>
3:     <% @plans.each do |plan| %>
4:       <li><%= link_to plan.name, service_user_registration_path(plan) %></li>
5:     <% end %>
6:   </ul>

Rails.root: /home/deploy/raise365-server

Application Trace | Framework Trace | Full Trace
app/views/devise/registrations/index.html.erb:3:in `_app_views_devise_registrations_index_html_erb___4342224496794252573_46995576956540'
app/controllers/registrations_controller.rb:10:in `index'

Request

Parameters:

None

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Response

Headers:

None