Hololens url to texture is not working

URL to Texture is working if using Unity Editor but when I build for Hololens I get this error.

 ArgumentNullException: Value cannot be null.
 Parameter name: _unity_self
    at UnityEngineProxy.InternalCalls.UnityWebRequest_Get_Custom_PropIsDone(Object self)
    at UnityEngine.WWW.WaitUntilDoneIfPossible()
    at UnityEngine.WWW.CreateTextureFromDownloadedData(Boolean markNonReadable)
    at ShelfMarkingPage.<>c__DisplayClass7_0.<startLoadImage>b__0()
    at UnityThread.Update()
    at UnityThread.$Invoke10(Int64 instance, Int64* args)
    at UnityEngine.Internal.$MethodUtility.InvokeMethod(Int64 instance, Int64* args, IntPtr method) 

Here is my script:

         private IEnumerator startLoadImage()
         {
     #if !UNITY_EDITOR
             Debug.Log("Image: " + ShelfHandle.ShelfHandler.Instance.ShelfImageURL);
             using (WWW www = new WWW(ShelfHandle.ShelfHandler.Instance.ShelfImageURL))
             {
                 yield return www;
                 try
                 {
                     UnityThread.executeInUpdate(() =>
                     {
                         Debug.Log("startLoadImage");
                         // assign texture
                         Sprite spr = new Sprite();
                         Debug.Log("startLoadImage");
                         spr = Sprite.Create(www.texture, new Rect(0, 0, www.texture.width, www.texture.height), new Vector2(0, 0), 100.0f);
                         Debug.Log("startLoadImage");
                         ShelfImage.GetComponent<Image>().sprite = spr;
                         Debug.Log("startLoadImage");
                         ShelfImage.SetActive(true);
                         Debug.Log("startLoadImage");
                     });
                 }
                 catch (Exception e)
                 {
                     Debug.Log(e.Message);
                 }
             }
     #else                           //test Shelf_ImageURL
             using (WWW www = new WWW("http://storage.rev-kitten.com/storage/static/uploads/pharmacy/4dc2a52e97040576d0e92d7ca20b6ae8.jpg"))
             {
                 yield return www;
                 try
                 {
                     Debug.Log("startLoadImage");
                     // assign texture
                     Sprite spr = new Sprite();
                     Debug.Log("startLoadImage");
                     spr = Sprite.Create(www.texture, new Rect(0, 0, www.texture.width, www.texture.height), new Vector2(0, 0), 100.0f);
                     Debug.Log("startLoadImage");
                     ShelfImage.GetComponent<Image>().sprite = spr;
                     Debug.Log("startLoadImage");
                     ShelfImage.SetActive(true);
                     Debug.Log("startLoadImage");
                 }
                 catch (Exception e)
                 {
                     Debug.Log(e.Message);
                 }
             }
     #endif
         }
 
 

The error is in the Sprite.Create i think this means that the www is null. but why? it returned the www so it should have value already? I also tried using

 using (UnityWebRequest uwr = UnityWebRequestTexture.GetTexture(ShelfHandle.ShelfHandler.Instance.ShelfImageURL))

same result. the uwr in this instance has been returned but with no value.

P.S. InternetClient, InternetClientServer is also turned on even though it is not needed for the editor.