Does not get along with Carrierwave::Mounter class (when using Sidekiq)

[ume-kun1015]

I just would like to know if I am missing something to let carrierwave gem upload files in background or is the gem that's causing this error.

The method store_in_background does not work well with Carrierwave::Mounter class
When you can afford time, could you please tell me what to do solve this error?

The error I am facing

[1] pry(#<Front::SharedFilesController>)> shared_file.save!
   (0.3ms)  BEGIN
  Project Load (0.3ms)  SELECT  `projects`.* FROM `projects` WHERE `projects`.`id` = 1 LIMIT 1
  User Load (0.3ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
   (0.2ms)  ROLLBACK
NoMethodError: undefined method `cache_name' for #<CarrierWave::Mounter:0x00007fdeab096af0>
bundler/gems/carrierwave_backgrounder-460394b0e2c0/lib/backgrounder/orm/base.rb:88:in `write_name_identifier'

Versions

carrierwave (1.2.2)
carrierwave_backgrounder (0.4.2)

Codes

class SharedFile < ApplicationRecord 
  mount_uploader :name, SharedFileUploader
  store_in_background :name
end

shared_file_worker.rb (sidekiq)

class SharedFileWorker
  include Sidekiq::Worker
  sidekiq_options queue: 'carrierwave'

  def perform(name, user_id, project_id)
    shared_file = SharedFile.new(
      name: name, user_id: user_id,
      project_id: project_id
    )
    begin
      shared_file.save!
    rescue => error
      logger.debug "Uploading Failed: #{error}"
    end
  end
end

shared_file_uploader.rb

class SharedFileUploader < CarrierWave::Uploader::Base
    include ::CarrierWave::Backgrounder::Delay

    if Rails.env.production? || Rails.env.development?
      storage :fog
    else
      storage :file
    end
end 

initializers/carrierwave_backgrounder.rb

CarrierWave::Backgrounder.configure do |config|
  config.backend :sidekiq, queue: :carrierwave
end