1769050 - 'Add Theme to Portal Desktop' option is missing after upgrade to Portal 7.3x or above

• The issue occurs after upgrade to SAP Netweaver Enterprise Portal 7.3x anvd above from any lower version like SAP Netweaver 7.0, 7.01 and 7.02.
• 'Add Theme to Portal Desktop' option in context menu is missing when a user tries to add a Theme to a Portal Desktop.

• Option for creating a new object(iView/Page/Workset/Role) is missing in context menu when a user tries to create an object in Portal Content Directory.

• In the trace files, following exceptions can be seen:

com.sapportals.portal.prt.component.PortalComponentException: Error in init method
Component : com.sap.portal.support.desk.default     
Caused by: com.sap.portal.prt.om.ObjectNotAvailableException: Object: [com.sap.portal.support.desk.default] load failed                                                                                                                                                           
Caused by: com.sap.portal.prt.broker.PortalComponentInstantiationException: Could not instantiate implementation class com.sap.portal.support.SupportDeskComponent of Portal Component com.sap.portal.support.desk.default because: Could not find implementation class

com.sapportals.portal.prt.component.PortalComponentException: Error in service call of Portal Component
Application name : com.sap.portal.appdesigner.framework
Component : pcd:portal_content/com.sap.pct/admin.templates/iviews/editors/com.sap.portal.pcmEditor
Component class : com.sap.portal.admin.propertyeditor.core_functionality.PCMEditor
User : <user_name>

Caused by: java.lang.NullPointerException: while trying to invoke the method com.sapportals.htmlb.Component.setParent(com.sapportals.htmlb.Container) of an object loaded from local variable 'component'

com.sapportals.portal.prt.runtime.PortalRuntimeException: The object found is not an IView: <XXX>

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

• SAP NetWeaver 7.3x
• SAP NetWeaver 7.4 
• SAP NetWeaver 7.5

Enterprise Portal 7.0, EP 7.0, Enterprise Portal 7.01, EP 7.01, Enterprise Portal 7.02, EP 7.02, Enterprise Portal 7.03, EP 7.03, Enterprise Portal 7.1, EP 7.1, Enterprise Portal 7.2, EP 7.2, Enterprise Portal 7.30, EP 7.30, Enterprise Portal 7.31, EP 7.31, Enterprise Portal 7.40, EP 7.4, Enterprise Portal 7.50, EP 7.5, modify portal desktop, unavailable, custom theme, customize, Add Theme to Portal Desktop, context menu, content administration, Portal content, com.sap.portal.pcmEditor, com.sapportals.portal.prt.runtime.PortalRuntimeException, com.sapportals.htmlb.Component.setParent, com.sap.portal.support.desk.default, The object found is not an IView,  Error in init method, new, right-click
, KBA , EP-PIN-TOL , Themes / Portal UI Theme Designer / Theme Editor , EP-PIN-NAV , Navigation , EP-PIN-PRT , Portal Runtime , Problem