change select_tag to select_tag"s"

app/views/admin/archive_files/_form.html.erb

@@ -81,7 +81,7 @@
       <!-- Tag -->
       <div class="control-group">
         <label class="control-label muted"><%= t(:tags) %></label>
-        <%= select_tag(f, @module_app) %>
+        <%= select_tags(f, @module_app) %>
       </div>
 
     </div>