show code that is producing twilio client error

device-setup.js

state = {
  device: new Twilio.Device();
};

state.device = state.device.setup(token, { allowIncomingWhileBusy: true });

resumeTwilioDevice = async () => {
  if (state.device.audio &&
      state.device.audio._audioContext &&
      state.device.audio._audioContext.state === 'suspended'
  ) {
    state.device.audio._audioContext.resume();
  }
};

// what I expected to be able to do was
resumeTwilioDevice = async () => {
  if (state.device.audioContext &&
      state.device.audioContext.state === 'suspended'
  ) {
    state.device.audioContext.resume();
  }
};