Typescript/Angular2 getUserMedia is not defined

I have an Ionic 2 App which uses QuaggaJS Github to Stream the Camera to my View (Div Container) like Snapchat to scan QR Codes. In the browser, it all works like a charm but, the moment it gets built as APK or IPA file I'm getting the Error:

chromium: [INFO:CONSOLE(76955)] "Error: getUserMedia is not defined"

I used ADB and a Virutal Android Device to get the logcat output. Important Info: Yes I have Camera Permission!

Just in case you cant visualize what I'm talking about ,here is a Screenshot of my Page View:

And this is my Typescript code:

import { Component, OnInit } from '@angular/core';
import { IonicPage, NavController, NavParams, MenuController } from 'ionic-angular';
import Quagga from 'quagga';
declare var Quagga:any;

@Component({
  selector: 'page-scanner',
  templateUrl: 'scanner.html',
})
export class Scanner implements OnInit {

  constructor(public navCtrl: NavController,
    public navParams: NavParams,
    public menu: MenuController) {
  }
   ngOnInit() {
     //WARNING:
     //Error: Types of property 'lift' are incompatible -> means
     //that the used typescript version is too high. Works with: 2.3.4 atm

     Quagga.init({
         inputStream : {
             name : "Live",
             type : "LiveStream",
             constraints: {
               width:  window.innerWidth,
               height: window.innerHeight,
               facingMode: "environment"
             },
             area: {
                top: "0%",
                right: "0%",
                left: "0%",
                bottom: "0%"
            },
            // Or '#yourElement' (optional)
           target: document.querySelector('#scanner')
         },
         locator: {
           patchSize: "medium",
           halfSample: true
         },
         numOfWorkers: (navigator.hardwareConcurrency ? navigator.hardwareConcurrency : 4),
         decoder : {
          //Change Reader for the right Codes
          readers: [ "code_128_reader",
                     "ean_reader",
                     "ean_8_reader",
                     "code_39_reader",
                     "code_39_vin_reader",
                     "codabar_reader",
                     "upc_reader",
                     "upc_e_reader",
                     "i2of5_reader" ],
         },
         locate: true
       }, function(err) {
           if (err) {
               console.log(err);
               return
           }
           console.log("Initialization finished. Ready to start");
           Quagga.start();
       });
       // Make sure, QuaggaJS draws frames an lines around possible
        // barcodes on the live stream
        Quagga.onProcessed(function(result) {
            var drawingCtx = Quagga.canvas.ctx.overlay,
                drawingCanvas = Quagga.canvas.dom.overlay;

            if (result) {
                if (result.boxes) {
                    drawingCtx.clearRect(0, 0, parseInt(drawingCanvas.getAttribute("width")), parseInt(drawingCanvas.getAttribute("height")));
                    result.boxes.filter(function (box) {
                        return box !== result.box;
                    }).forEach(function (box) {
                        Quagga.ImageDebug.drawPath(box, {x: 0, y: 1}, drawingCtx, {color: "green", lineWidth: 2});
                    });
                }

                if (result.box) {
                    Quagga.ImageDebug.drawPath(result.box, {x: 0, y: 1}, drawingCtx, {color: "#00F", lineWidth: 2});
                }

                if (result.codeResult && result.codeResult.code) {
                    Quagga.ImageDebug.drawPath(result.line, {x: 'x', y: 'y'}, drawingCtx, {color: 'red', lineWidth: 3});
                }
            }
        });
      // Once a barcode had been read successfully, stop quagga and
      // close the modal after a second to let the user notice where
      // the barcode had actually been found.
      Quagga.onDetected(function(result) {
        if (result.codeResult.code){
        // Was passieren soll wenn ein Code gescannt wurde
        //  $('#scanner_input').val(result.codeResult.code);
        }
      });
   }
   ionViewWillLeave(){
     Quagga.stop();
   }
}

Well this may be the dumpest answer I have ever written, but I sloved my problem by myself. Sometimes the easiest things are the reasons of weird errors.

Well as it states here getUserMedia() is aviable on Android 5.0+, but I worked the whole time on Android 4.4.2 Device. After an Update all worked fine.

This release introduces the PermissionRequest class, which allows your app to grant the WebView permission to access protected resources like the camera and microphone, through web APIs such as getUserMedia(). Your app must have the appropriate Android permissions for these resources in order to grant the permissions to the WebView.

I've never had 3 days as much wasted as with this error. Cheers