Why does this Elevenlabs voice not working?

const talkResponse = await fetchWithRetries(`${DID_API.url}/talks/streams/${streamId}`, {
  method: 'POST',
  headers: {
    Authorization: `Basic ${DID_API.key}`,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    script: {
      type: 'text',
      subtitles: 'false',
      provider: {type: 'elevenlabs', voice_id: '21m00Tcm4TlvDq8ikWAM'},
      ssml: 'false',
      input: 'Hello, I am alex'
    },
    config: {fluent: 'false', pad_audio: '0.0'},
    session_id: sessionId,
  }),
});

}

Only Microsoft voice id work for me, why?