NullReferenceException: Object reference not set to an instance of an object when trying to create AR project with Vuforia

Hi, I'm trying to create a simple AR project using the steps in this tutorial : http://www.justapixel.co.uk/how-to-make-an-ar-app-in-5-minutes-with-unity-and-vuforia/

When I hit the play mode I get 5 errors:

Here is my TurnOffBehaviour.cs : sing UnityEngine;

namespace Vuforia { ///

     #region UNITY_MONOBEHAVIOUR_METHODS

     void Awake()
     {
         if (VuforiaRuntimeUtilities.IsVuforiaEnabled())
         {
             // We remove the mesh components at run-time only, but keep them for
             // visualization when running in the editor:
             MeshRenderer targetMeshRenderer = this.GetComponent<MeshRenderer>();
             Destroy(targetMeshRenderer);
             MeshFilter targetMesh = this.GetComponent<MeshFilter>();
             Destroy(targetMesh);
         }
     }

     #endregion // UNITY_MONOBEHAVIOUR_METHODS

 }

}

I haven't done or edited anything. All I did is following the steps of the tutorial. What's wrong and how can I fix this? I'm using Unity 5.3.2f1 (32-bits) and Vuforia 5.0.10 (That's the only SDK available now).

I would really appreciate any help!