Nintex Forms 1.5.2.0 DatePicker Issues

Hi,

 We upgraded to Nintex Forms 1.5.2.0 from 1.4.1.4 to try out the new PeoplePicker functionality. When we Preview or add new list item for a published Form, the form is not rendered at all. The IE 11 debugger is saying 'Unable to get property 'RegisterAfterReady' of undefined or null reference'.

 Below is the code snippet where it is failing ( NWF.FormFiller.Events.RegisterAfterReady(nfInitDatePicker);)

function fn3b13e59fc5544ddcb97b0e58f8ddd10c(sourceContext, rowIndex) { return NWF.FormFiller.Functions.GetValue('fe189e0b-1c1e-4f10-8c14-b2b891772fe5', sourceContext)+NWF.FormFiller.Functions.GetValue('02866174-a8e1-4be0-894b-6a4c258be0ec', sourceContext) ;}//]]>

</script>

<script> NWF$(document).ready(function() { CalculationFunctions.push({ Name: fn3b13e59fc5544ddcb97b0e58f8ddd10c, Control: 'fe189e0b-1c1e-4f10-8c14-b2b891772fe5', Result: '3b13e59f-c554-4ddc-b97b-0e58f8ddd10c'}); });NWF$(document).ready(function() { CalculationFunctions.push({ Name: fn3b13e59fc5544ddcb97b0e58f8ddd10c, Control: '02866174-a8e1-4be0-894b-6a4c258be0ec', Result: '3b13e59f-c554-4ddc-b97b-0e58f8ddd10c'}); }); </script>

<script type="text/javascript">

//<![CDATA[

              NWF$(document).ready(function() {{

                NWF.FormFiller.Events.RegisterAfterReady(nfInitDatePicker);

            }});

Removing DatePicker controls enables the form to be rendered. Anybody experience this and how to resolve? Thanks.