Unable to group Sonos Speakers

Configuration
1

Hello guys,
i’m trying to group my Sonos speakers without any success.
I’m using the following script:

alias: Radio aan
description: ""
trigger:
  - platform: time
    at: "07:45:00"
condition:
  - condition: time
    weekday:
      - thu
action:
  - service: media_player.volume_set
    data:
      volume_level: 0.21
    target:
      device_id:
        - media_player.bad
        - media_player.buro
  - service: media_player.join
    data:
      master: media_player.wohnzimmer
      entity_id: media_player.bad
  - service: media_player.select_source
    data:
      source: '{{ (state_attr("sensor.sonos_favorites", "items").values() | list)[3]}}'
    target:
      device_id:
        - wohnzimmer
mode: single

This is my first try, finaly i would like to have some buttons to add or remove a speaker from a group and start a tunein stream.

Hopefuly someone can give me any advice .

Best regards

2

that service isn’t correct.

here are the docs for it:

so I think it should be like this:

  - service: media_player.join
    data:
      entity_id: media_player.wohnzimmer
      group_members: media_player.bad