Roku Remote

Is it possible to change the TV’s volume using a Roku Streaming Stick (not a Roku TV)?
My remote does it but not thru home assistant.

2019-02-06 13:21:43 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved

roku_volume_down:
  alias: ROKU VOLUME DOWN
  sequence:
  - service: remote.send_command
    data:
      entity_id: remote.roku_streaming_stick
      command:
        - volume_down