Ionic Native: tried calling QRScanner.prepare, but the QRScanner plugin is not installed

Hello,

Im running ionic v3, and doing some tests;

My plugins:

neptune:scanApp chris$ …/node_modules/ionic/bin/ionic cordova plugin ls

cordova plugin ls
cordova-plugin-camera 4.0.3 "Camera"
cordova-plugin-qrscanner 2.6.0 "QRScanner"
neptune:scanApp chris$

The Camera plugin is working fine, but when I try to use the QR Scanner , i get this error in console:

[app-scripts] [12:58:19]  console.warn: Ionic Native: tried calling QRScanner.prepare, but the QRScanner plugin is not installed.
[app-scripts] [12:58:19]  console.warn: Install the QRScanner plugin: 'ionic cordova plugin add cordova-plugin-qrscanner'
[app-scripts] [12:58:19]  console.log: Error is plugin_not_installed

Installed via this link:

Im using IonicAppDev on Ios.

app.module.ts:

import { Camera } from '@ionic-native/camera';
import { QRScanner } from '@ionic-native/qr-scanner';

...

  providers: [
    StatusBar,
    SplashScreen,
    Camera,
    QRScanner,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]

the page:


import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { QRScanner, QRScannerStatus } from '@ionic-native/qr-scanner';
import { Camera, CameraOptions } from '@ionic-native/camera';

@Component({
  selector: 'page-about',
  templateUrl: 'about.html'
})

export class AboutPage {

  currentImage: any;

  constructor(public navCtrl: NavController, private camera: Camera, private qrScanner: QRScanner) {

  }

  takePicture() {
    this.qrScanner.prepare()
......

When clicking on the button, it fires takePicture(). And then im getting that error… ANy one?