title: Ruby on Rails - Actionpack: wrong argument type Class (expected Module) (TypeError)
body: <p>I'm facing this problem with Rails and heroku:
  On my pc everything works well, but the same application on heroku does not work, because of this error:</p>
  
  <pre><code>/app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `include': wrong argument type Class (expected Module) (TypeError)
  </code></pre>
  
  <p>Here I paste the full stack trace:</p>
  
  <pre><code>$: heroku run rails console
  Running rails console on myapp... up, run.4782
  /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `include': wrong argument type Class (expected Module) (TypeError)
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `block in add_template_helper'
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `module_eval'
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `add_template_helper'
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:109:in `block in helper'
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:108:in `each'
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:108:in `helper'
      from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/action_controller/railties/helpers.rb:17:in `inherited'
      from /app/app/controllers/application_controller.rb:1:in `&lt;top (required)&gt;'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:274:in `require'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:274:in `block in require'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:240:in `load_dependency'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:274:in `require'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:360:in `require_or_load'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:317:in `depend_on'
      from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:233:in `require_dependency'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:472:in `block (2 levels) in eager_load!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:471:in `each'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:471:in `block in eager_load!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:469:in `each'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:469:in `eager_load!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:346:in `eager_load!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application/finisher.rb:56:in `each'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application/finisher.rb:56:in `block in &lt;module:Finisher&gt;'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:30:in `instance_exec'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:30:in `run'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:55:in `block in run_initializers'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `each'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `call'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
      from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:54:in `run_initializers'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:352:in `initialize!'
      from /app/config/environment.rb:5:in `&lt;top (required)&gt;'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:328:in `require'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:328:in `require_environment!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:142:in `require_application_and_environment!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:67:in `console'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
      from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands.rb:17:in `&lt;top (required)&gt;'
      from /app/bin/rails:8:in `require'
      from /app/bin/rails:8:in `&lt;main&gt;'
  </code></pre>
  
  <p>I could not figure out what could it be!</p>
  
  <p>Could you give me some help?</p>