Compilation error: 'handleEvents' is not a member of 'BLEDevice'

I apologize for the confusion. The `handleEvents()` function is not available in the Arduino ESP32 BLE library. Instead, you can use the `BLEDevice::loop()` function to handle BLE events. Here's an updated version of the code:

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"

BLECharacteristic *pCharacteristic;

class MyServerCallbacks : public BLEServerCallbacks {
  void onConnect(BLEServer* pServer) {
    Serial.println("Device connected");
  }

  void onDisconnect(BLEServer* pServer) {
    Serial.println("Device disconnected");
  }
};

void setup() {
  Serial.begin(115200);

  BLEDevice::init("MyESP32");
  BLEServer *pServer = BLEDevice::createServer();
  pServer->setCallbacks(new MyServerCallbacks());
  BLEService *pService = pServer->createService(SERVICE_UUID);
  pCharacteristic = pService->createCharacteristic(
      CHARACTERISTIC_UUID,
      BLECharacteristic::PROPERTY_READ |
      BLECharacteristic::PROPERTY_WRITE
  );
  pCharacteristic->setValue("Hello World");
  pService->start();

  BLEAdvertising *pAdvertising = pServer->getAdvertising(); // Updated line
  pAdvertising->addServiceUUID(SERVICE_UUID);
  pAdvertising->setScanResponse(false);
  pAdvertising->start();
}

void loop() {
  BLEDevice::loop(); // Updated line
}

Please replace the previous `BLEDevice::handleEvents()` line with `BLEDevice::loop()`. This should resolve the compilation error.

Please note that the `BLEDevice::loop()` function must be called frequently in the `loop()` function to handle BLE events.