Facebook quick_replies not showing on rasa 2.x

[Deprecated] Rasa X Community Edition
2

I removed the custom: tag right after the - channel: facebook and it seems to work just fine

  utter_usefulness_checker:
  - buttons:
    - payload: /confirm
      title: Sim
    - payload: /deny
      title: Não
    text: Esta resposta foi útil?
  - channel: facebook
    quick_replies:
    - content_type: text
      payload: /confirm
      title: Sim
    - content_type: text
      payload: /deny
      title: Não
    text: Esta resposta foi útil?