Autodesk forge Viewer

[ruhamadavid]

Hi, I'm getting following error when tried to call (viewer3D.js Initialize function),
Uncaught TypeError: avp.RenderScene is not a constructor
at Viewer3DImpl.initialize (viewer3D.js?v=v4.0:26059)
at GuiViewer3D.Viewer3D.initialize (viewer3D.js?v=v4.0:44646)
at GuiViewer3D.initialize (viewer3D.js?v=v4.0:50771)

Even though after importing the following scripts:

<script src="https://developer.api.autodesk.com/modelderivative/v2/viewers/three.js"></script>

<script src="https://developer.api.autodesk.com/modelderivative/v2/viewers/viewer3D.js?v=v4.0"></script>

Here is my code,
this.LoadViewerDocument = function (viewer2DContainer) {
var options = {
'env': 'Local',
'document': './ES-TR-01AR/primaryGraphics.f2d'
};
setTimeout(function () {
viewer2D = new Autodesk.Viewing.Private.GuiViewer3D(viewer2DContainer, {})
}, 2000);
setTimeout(function () {
viewer2D.initialize(); // Initialize the viewer
viewer2D.loadModel(options.document);
this.onSuccessDocumentLoadCB();
}, 5000);
}

Anyone can suggest a solution for this.?