### Answer
The issue with ElevenLabs voice not working when tested from the Vapi dashboard, despite setting the API key, could be due to a variety of reasons including account type limitations or configuration issues. While there is no direct information in the provided sources about the need to upgrade from a free ElevenLabs account to a paid one for compatibility with Vapi, it's important to ensure that all configuration steps were correctly followed and that the ElevenLabs account you are using does not have limitations that affect its integration with third-party services like Vapi.
For troubleshooting, ensure your API key is correctly entered in the Vapi dashboard and check if there are any restrictions associated with your current ElevenLabs account tier. If the problem persists, reviewing documentation from both Vapi and ElevenLabs or reaching out to their support might offer more specific guidance.
For more details on setting up voice providers with Vapi, you can refer to the [Provider Keys documentation](
) [(1)](
) .