Using SAP UI5 Inbox Element - 404 Resource not found

Hi,

I am trying to use SAP UI5 Inbox Element and getting error 404 resource not found. Below is the screenshot for reference.

I have already followed the instruction Inbox UI using UI5 without any success. I have included the library in bootstrap as below -

<script src="resources/sap-ui-core.js"  id="sap-ui-bootstrap"  data-sap-ui-libs="sap.ui.commons,sap.uiext.inbox"  data-sap-ui-theme="sap_bluecrystal">  </script>

and trying to create inbox object as per the sap ui5 demokit as below -

var locale = 'en';  var inx = new sap.uiext.inbox.Inbox();  inx.setHandleBindings(false);

I would really appreciate if any pointer or suggestion where I am doing it wrong?

Thanks & Regards

Jeet