MRTK open Hololens 2 camera on button click and display the image in the Untiy scene after it is captured

As described in the title I have a scene wich contains a button. I attached a script with the code you see below to a PhotoManager GameObject. The button runs TakePhoto() from the script below when the button gets pressed.

I expected that when you click the button, the HoloLens will open the camera and you can take a picture. Once the picture has been taken, the user should see it in the scene. However, nothing happens when you click the button...

When i run the scene in unity and press the button in the game window i'm getting this error: InvalidOperationException: Sequence contains no elements. (I dont have a webcam connected to my computer)

The code is form the Unity documentation.

 using UnityEngine;
 using System.Collections;
 using System.Linq;
 using UnityEngine.Windows.WebCam;
 
 public class PhotoCaptureExample : MonoBehaviour
 {
     PhotoCapture photoCaptureObject = null;
     Texture2D targetTexture = null;
 
     // Use this for initialization
     public void TakePhoto()
     {
         Resolution cameraResolution = PhotoCapture.SupportedResolutions.OrderByDescending((res) => res.width * res.height).First();
         targetTexture = new Texture2D(cameraResolution.width, cameraResolution.height);
 
         // Create a PhotoCapture object
         PhotoCapture.CreateAsync(false, delegate (PhotoCapture captureObject) {
             photoCaptureObject = captureObject;
             CameraParameters cameraParameters = new CameraParameters();
             cameraParameters.hologramOpacity = 0.0f;
             cameraParameters.cameraResolutionWidth = cameraResolution.width;
             cameraParameters.cameraResolutionHeight = cameraResolution.height;
             cameraParameters.pixelFormat = CapturePixelFormat.BGRA32;
 
             // Activate the camera
             photoCaptureObject.StartPhotoModeAsync(cameraParameters, delegate (PhotoCapture.PhotoCaptureResult result) {
                 // Take a picture
                 photoCaptureObject.TakePhotoAsync(OnCapturedPhotoToMemory);
             });
         });
     }
 
     void OnCapturedPhotoToMemory(PhotoCapture.PhotoCaptureResult result, PhotoCaptureFrame photoCaptureFrame)
     {
         // Copy the raw image data into the target texture
         photoCaptureFrame.UploadImageDataToTexture(targetTexture);
 
         // Create a GameObject to which the texture can be applied
         GameObject quad = GameObject.CreatePrimitive(PrimitiveType.Quad);
         Renderer quadRenderer = quad.GetComponent<Renderer>() as Renderer;
         quadRenderer.material = new Material(Shader.Find("Custom/Unlit/UnlitTexture"));
 
         quad.transform.parent = this.transform;
         quad.transform.localPosition = new Vector3(0.0f, 0.0f, 3.0f);
 
         quadRenderer.material.SetTexture("_MainTex", targetTexture);
 
         // Deactivate the camera
         photoCaptureObject.StopPhotoModeAsync(OnStoppedPhotoMode);
     }
 
     void OnStoppedPhotoMode(PhotoCapture.PhotoCaptureResult result)
     {
         // Shutdown the photo capture resource
         photoCaptureObject.Dispose();
         photoCaptureObject = null;
     }
 }