uninitialized constant Ckeditor::Orm - Rails 4 (ckeditor gem)

Hey guys i am trying to install ckeditor gem on my environment but i can't upload files or pictures i get this

NameError in Ckeditor::PicturesController#index

uninitialized constant Ckeditor::Orm

extracted source:

class Ckeditor::Asset < ActiveRecord::Base
  include Ckeditor::Orm::ActiveRecord::AssetBase

  delegate :url, :current_path, :content_type, :to => :data

  validates_presence_of :data

i am using carrierwave + minimagick and i did use the command to install and did migration as well.

any help appreciated.