NoMethodError in Questions#show

Showing /var/www/staging/releases/20150508133155/app/views/videos/_thumbnail.html.erb where line #4 raised:

undefined method `name' for nil:NilClass

Extracted source (around line #4):

1: <%= grid_item_tag_for(video, video_counter) do %>
2:   <%= link_to person_question_video_path(video.person, video.question), :id => "#{dom_id video}_link" do %>
3:     <%= caption_for video %>
4:     <%= image_tag video.person_image_url(:thumb).to_s, :id => "#{dom_id video}_veteran_image", :alt => video.person.name, "aria-hidden" => "true" %>
5:   <% end %>
6: <% end %>

Trace of template inclusion: app/views/videos/_grid.html.erb, app/views/families_questions/index.html.erb

Rails.root: /var/www/staging/releases/20150508133155

Application Trace | Framework Trace | Full Trace
app/views/videos/_thumbnail.html.erb:4:in `block (2 levels) in _app_views_videos__thumbnail_html_erb__2067449735610644837_69232400'
app/views/videos/_thumbnail.html.erb:2:in `block in _app_views_videos__thumbnail_html_erb__2067449735610644837_69232400'
app/helpers/questions_helper.rb:5:in `grid_item_tag_for'
app/views/videos/_thumbnail.html.erb:1:in `_app_views_videos__thumbnail_html_erb__2067449735610644837_69232400'
app/views/videos/_grid.html.erb:94:in `_app_views_videos__grid_html_erb__809416684095994244_69384920'
app/views/families_questions/index.html.erb:36:in `_app_views_families_questions_index_html_erb__32350177211450105_72000980'
app/controllers/questions_controller.rb:44:in `block (2 levels) in show'
app/controllers/questions_controller.rb:39:in `show'
lib/ptsd/export_and_relink.rb:178:in `export_path'
lib/ptsd/export_and_relink.rb:30:in `block (3 levels) in test_export'
lib/ptsd/export_and_relink.rb:30:in `each'
lib/ptsd/export_and_relink.rb:30:in `block (2 levels) in test_export'
lib/ptsd/export_and_relink.rb:28:in `block in test_export'
lib/ptsd/export_and_relink.rb:23:in `test_export'

Request

Parameters:

{"id"=>"who-i-am-fam",
 "page"=>"3",
 "format"=>"html"}

Show session dump

Show env dump

Response

Headers:

None