Redmine › Advertising

I copy a project in admin and it's get a error 500 in Redmine.

if I uninstall Advertising (Reklama) plugin, Redmine copy projetcs is successful.

<pre>
Environment:
Redmine version 2.4.1.stable
Ruby version 1.9.3-p448 (2013-06-27) [x86_64-linux]
Rails version 3.2.15
Environment production
Database adapter Mysql2
</pre>

<pre>
Started GET "/projects/eda_designer/copy" for xx.xx.xx.xx
Processing by ProjectsController#copy as HTML
Parameters: {"id"=>"eda_designer"}
Current user: xxx (id=5)
Rendered projects/_form.html.erb (25.7ms)
Rendered projects/copy.html.erb within layouts/base (64.4ms)
Completed 500 Internal Server Error in 261.7ms

ActionView::Template::Error (can't convert nil into Integer):
47: <div id="main-menu">
48: <%= render_main_menu(@project) %>
49: </div>
50: <% end %>
51: </div>
52:
53: <div id="main" class="<%= sidebar_content? ? '' : 'nosidebar' %>">
lib/redmine/hook.rb:61:in `block (2 levels) in call_hook'
lib/redmine/hook.rb:61:in `each'
lib/redmine/hook.rb:61:in `block in call_hook'
lib/redmine/hook.rb:58:in `tap'
lib/redmine/hook.rb:58:in `call_hook'
lib/redmine/hook.rb:158:in `call_hook'
app/helpers/application_helper.rb:1186:in `view_layouts_base_sidebar_hook_response'
app/helpers/application_helper.rb:1182:in `sidebar_content?'
app/views/layouts/base.html.erb:50:in `_app_views_layouts_base_html_erb___2112305189385173297_38977580'
</pre>