Fix block init

app/models/communication/block/template/call_to_action.rb

@@ -23,6 +23,14 @@ class Communication::Block::Template::CallToAction < Communication::Block::Templ
     "#{data['button_secondary']}"
   end
 
+  def url_tertiary
+    "#{data['url_tertiary']}"
+  end
+
+  def button_tertiary
+    "#{data['button_tertiary']}"
+  end
+
   def image
     extract_image_alt_and_credit data, 'image'
   end

app/views/admin/communication/blocks/templates/image/_preview.html.erb

-<%= kamifusen_tag @block.template.image.blob,
-                  width: 600,
-                  alt: @block.template.image.alt,
-                  class: 'img-fluid' if @block.template.image %>
-<caption><%= @block.template.image.alt %></caption>
-<p class="small"><%= @block.template.image.credit %></p>
-<%= @block.template.text.html_safe %>
+<% if @block.template.image&.blob %>
+  <%= kamifusen_tag @block.template.image.blob,
+                    width: 600,
+                    alt: @block.template.image.alt,
+                    class: 'img-fluid' if @block.template.image %>
+  <caption><%= @block.template.image.alt %></caption>
+  <p class="small"><%= @block.template.image.credit %></p>
+  <%= @block.template.text.html_safe %>
+<% end %>