Ibeacon not working with ionic v3

I am using the sample code given by “Ionic Native IBeacon” but it is not working. When I run it on my device, I just get a blank screen. I recently ran a virtual developer tool and found this error message on the app
"Uncaught TypeError: Cannot read property ‘Delegate’ of undefined

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { IBeacon } from '@ionic-native/ibeacon';
  selector: 'page-about',
  templateUrl: 'about.html'

export class AboutPage {
  constructor(public navCtrl: NavController, private ibeacon: IBeacon) {}
    // Request permission to use location on iOS


// create a new delegate and register it with the native layer
let delegate = this.ibeacon.Delegate();

// Subscribe to some of the delegate's event handlers
    data => alert('didRangeBeaconsInRegion: ' + data),
    error => console.error()
    data => alert('didStartMonitoringForRegion: ' + data),
    error => console.error()
    data => {
      alert('didEnterRegion: ' + data);

  let beaconRegion = this.ibeacon.BeaconRegion('deskBeacon','F7826DA6-ASDF-ASDF-8024-BC5B71E0893E');

    () => console.log('Native layer received the request to monitoring'),
    error => console.error('Native layer failed to begin monitoring: ', error)

Virtually always in these situations, if you attach to the app using Chrome’s Developer Tools and look in the console, you will get an informative error message.

I found this error @rapropos "Uncaught TypeError: Cannot read property ‘Delegate’ of undefined