ArgumentError in Front#gallery

Showing /mnt/volume_cloud/html/casadeculturagoiania.com.br/app/views/front/gallery.html.erb where line #35 raised:

Nil location provided. Can't build URI.
Extracted source (around line #35):
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<% @gallery.gallery_pictures.each do |gp| %>
<li class="content_slider_li_1">
<%= image_tag gp.picture_url, class: 'scale-with-grid wp-post-image', width: 890, height: 470 %>
</li>
<% end %>
</ul>

Rails.root: /mnt/volume_cloud/html/casadeculturagoiania.com.br

Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"id"=>"14"}

Response

Headers:

None