Microphone not working in React Native example.

I am using https://github.com/agmmnn/streaming-api-react-native/ and the avatar is unresponsive to spoken input. I have installed the expo camera plugin as suggested in an answer to a previous question on this issue. This has no effect. The app now requests microphone permission, but the avatar does not respond when spoken to. It only responds to text typed into the text input.

Please do not close this question as answered until an actual solution is provided. Thanks

Previous question: https://docs.heygen.com/discuss/6786b89e7a313a006a385c6b