TTS not working on Sonos One SL

Configuration
,
1

I can’t get TTS to work on my Sonos One SL. When I execute following YAML I get the response “Action run successfully” but the speaker won’t play any sound.

service: media_player.play_media
data:
  announce: true
  media_content_id: |
    media-source://tts/tts.google_en_com?message=Hello
  media_content_type: music
  extra:
    volume: 50
target:
  entity_id: media_player.bathroom

I added media_source: to my configuration.yaml and imported the Google Translate TTS Integration. Why is it not working?

Thank you for your response!