Redmine › Subscription

When having the project sections activated (not sure if it is implied or not) and activate the module, if you try to navigate it crashes.

• Overview → crashes.
• Activity → does not.
• Wiki books → does not.
• Roadmap → crashes.
• Issues → crashes.
• Issues new → does not.
• News → crashes.
• Documents → does not.
• Wiki → crashes.
• Files → Crashes.
• Settings → does not.

This is the trace for Overview:

Started GET "/project/gatatac/gatatac-web" for 85.59.64.135 at 2013-11-21 18:56:01 +0000
Processing by ProjectsController#show as HTML
  Parameters: {"section"=>"gatatac/gatatac-web"}
  Current user: txinto (id=3)
  Rendered plugins/like/app/views/like/common/_facebook.html.erb (0.4ms)
  Rendered plugins/like/app/views/like/project/_content.html.erb (4.0ms)
  Rendered projects/_members_box.html.erb (6.0ms)
  Rendered news/_news.html.erb (33.7ms)
  Rendered plugins/like/app/views/like/project/_sidebar.html.erb (1.9ms)
  Rendered plugins/meta/app/views/meta/_projects.html.erb (19.4ms)
  Rendered plugins/sidebar/app/views/sidebar/_project.html.erb (12.8ms)
  Rendered projects/show.html.erb within layouts/base (216.1ms)
  Rendered plugins/redmine_wiki_extensions/app/views/wiki_extensions/_html_header.html.erb (19.4ms)
  Rendered plugins/subscription/app/views/subscribe/_form.html.erb (1892.3ms)
  Rendered plugins/subscription/app/views/subscribe/_sidebar.html.erb (1898.4ms)
Completed 500 Internal Server Error in 2545.4ms

ActionView::Template::Error (undefined method `link_to_remote' for #<#<Class:0x00000007cf9610>:0x007fb2d10d4c70>):
    10:   <div id="subscribe">
    11: 
    12:     <div class="contextual">
    13:       <%= link_to_remote(@subscriber && !@subscriber.new_record? ? l(:button_update) : l(:label_subscribe),
    14:                          :url => { :controller => 'subscriptions',
    15:                                    :action     => 'subscription',
    16:                                    :id         => @project,
  app/helpers/application_helper.rb:1179:in `content_for'
  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/controllers/projects_controller.rb:163:in `show'