fix server

app/views/server/blocks/show.html.erb

@@ -12,7 +12,7 @@
   </thead>
   <tbody>
     <% @blocks.each do |block| %>
-      <% next if block.nil?%>
+      <% next if block.about.nil?%>
       <% url = "#{block.about.university.url }#{edit_admin_communication_block_path(block)}" %>
       <tr>
         <td><%= truncate "#{block}" %></td>