Sonos Mini Player Config

I have some problems with the configuration of mini-media-player in the Dashboard.

I use 3 Sonos speaker

  • Wohnzimmer (should be the Master), Type Beam with 2 Symfonisk
  • Kueche, Type One SL
  • Buero, Type One SL

I used this code, but I can’t see the Master and the Speaker Kueche doesn’t work > what’s wrong in this code?

type: 'custom:mini-media-player'
entity: media_player.sonos_wohnzimmer
hide:
  power: true
speaker_group:
  platform: sonos
  show_group_count: true
  entities:
    - entity_id: media_player.sonos_wohnzimmer
      name: Sonos sonos_wohnzimmer
    - entity_id: media_player.sonos_kueche
      name: Sonos sonos_kueche
    - entity_id: media_player.sonos_buero
      name: Sonos sonos_buero
entities:
  - type: 'custom:mini-media-player'
    entity: media_player.multiroom_player
    group: true
    source: icon
    artwork: cover
    info: short
    hide:
      volume: true
      power: true
  - type: 'custom:mini-media-player'
    entity: media_player.sonos_wohnzimmer
    group: true
    hide:
      controls: true
  - type: 'custom:mini-media-player'
    entity: media_player.sonos_kueche
    group: true
    hide:
      controls: true
  - type: 'custom:mini-media-player'
    entity: media_player.sonos_buero
    group: true
    hide:
      controls: true

grafik

Is this here in a wrong category or nobody has any idea?