BLE/NRF error

After solving the existing problems, I found that callback function for onWrite() is not implemented.
And Unable to implement the notify and indicate, my phone always reports error when sending notification listening requests to ESP32.

NRF.setServices({
  0x1901: {
    0x1902: {
      value : "Hello",
      broadcast : true,
      readable : true,
      writable : true,
      notify : true,
      indicate: true,
      onWrite: (event) => {
        console.log("Got: ", event);
      }
    }
  }
});