title: Rails 5 ActionController::InvalidAuthenticityToken error
body: <p>I have a rails application which I am planning to upgrade to rails 5. I am using devise(v4.2.0) along with rails(v5.0.0). As suggested in devise README.md file, I tried moving the protect_from_forgery above the before_filter but still when I am trying to login or update my bug I get an error <code>ActionController::InvalidAuthenticityToken</code></p>
  
  <p>My <code>Application Controller</code> is </p>
  
  <pre><code>class ApplicationController &lt; ActionController::Base
   protect_from_forgery with: :exception, prepend: true
   before_action :configure_permitted_parameters, if: :devise_controller?
  
    protected
  
     def configure_permitted_parameters
       devise_parameter_sanitizer.permit(:sign_up, keys: [:name])
       devise_parameter_sanitizer.permit(:account_update, keys: [:name])
     end
  
  end
  </code></pre>
  
  <p>And my other <code>BugController</code> is </p>
  
  <pre><code>class BugsController &lt; ApplicationController
    protect_from_forgery prepend: true, with: :exception
    before_action :authenticate_user!
    before_action :set_bug, only: [:show, :edit, :update]
  
      def update
        respond_to do |format|
        if @bug.update(bug_params)
          format.html { redirect_to @bug, notice: 'Bug was successfully updated.' }
          format.json { render :show, status: :ok, location: @bug }
       else
          format.html { render :edit }
          format.json { render json: @bug.errors, status: :unprocessable_entity }
       end
       end
     end
  
  private
  def bug_params
    params.require(:bug).permit(:product, :component, :title, :description, :status_id, :created_by_id, :assigned_to_id)
  end
  
  
  end
  </code></pre>