The graph_mail.helper service is requiring the wrong service

The graph_mail.helper service is defined as follows.

  graph_mail.helper:
    class: Drupal\graph_mail\MailHelper
    arguments:
      - '@config.factory'
      - '@http_client'
      - '@datetime.time'
      - '@queue.factory'

The last argument is a wrong service reference: The correct service is queue, although the class used to implement it is a factory class.