Not able to navigate to custom object summaryView created on top of objectViewTemplate summaryViews extension

I have the following entries in the plugin.xml for a custom object using templates.

<templateInstance id="<namespace>.viewTemplateInstance">

      <templateId>vsphere.core.inventory.objectViewTemplate</templateId>

      <variable name="namespace" value="<namespace>"/>

      <variable name="objectType" value="ciscoUCS:object"/>

      <excludedExtension><namespace>.related</excludedExtension>

   </templateInstance>

   <extension id="com.cisco.ucs.vcplugin.UcsDomainAppCategory">

      <extendedPoint>vise.navigator.nodespecs</extendedPoint>

      <object>

         <title>#{objectNavigator.ucsdomain.app.category.label}</title>

         <parentUid>vsphere.core.navigator.virtualInfrastructure</parentUid>

      </object>

   </extension>

    <templateInstance id="com.cisco.ucs.vcplugin.lists.allUcs">

       <templateId>vsphere.core.inventorylist.objectCollectionTemplate</templateId>

       <variable name="namespace" value="<namespace>.UcsCollection"/>

       <variable name="title" value="#{someLabel}"/>

       <variable name="icon" value="#{someIcon}"/>

       <variable name="objectType" value="ciscoUCS:SomeObject"/>

       <variable name="listViewId" value="<namespace>.list"/>

       <variable name="parentUid" value="com.cisco.ucs.vcplugin.UcsDomainAppCategory"/>

    </templateInstance>

I also have a list.columns extension for the concerened namespace. On the global inventory I am able to get my object and on selecting it I am able to get the list of objects in the workspace. When I click on one object I expect I get navigated to the summary view of the object for which I have an extension too as below...

<extension id="com.cisco.ucs.vcplugin.handle.SummaryView">

<extendedPoint>com.cisco.ucs.vcplugin.handle.summaryViews</extendedPoint>

<object>

<name>Domain Summary</name>

<componentClass className="com.vmware.vsphere.client.htmlbridge.HtmlView">

<object>

<root>

<url>/vsphere-client/ucshtmlui/index.html?view=summary</url>

</root>

</object>

</componentClass>

</object>

</extension>

I have a routing table entry in the app.routing component of my app for 'summary'. But selecting an object gives the following on chrome console

GET https://localhost:9443/ui/navigation/data/vsphere.core.inventory.serverObjectViewsExtension?objectId=cr:ciscoUCS:UcsHandleMap:UCS%25252F%25252F10.106.233.156 500 (Internal Server Error)

For the chassisA sample I see that the object selection navigates to

zone.min.js:1XHR finished loading: GET "https://localhost:9443/ui/navigation/data/com.vmware.samples.chassisa.SummaryView?objectId=urn:vri:samples:ChassisA:chassis-2".

Please let me know what am I missing here. Appreciate your help.

Thanks

Manoj M