2364865 - Portal Administration pages are blank after system upgrade or patching

• You have upgraded, applied a support pack upgrade or patched your Netweaver system and the Content Administration, User Administration, Portal display etc. catalogues no longer open
• The following error or similar can be observed under the server Default Trace files:
  "#EP-PIN-PRT#tc~epbc~prtc~api#C0000A01017F00460000000E000006EC#3928150000000004#sap.com/irj#com.sap.portal.prt.request.pom#Administrator#3##53FF5629761711E6AC640000003BF056#554f761b761711e6cee40000003bf056##0#Thread[HTTP Worker [@1621596553],5,Dedicated_Application_Thread]#Plain##
  [PortalNode.fireEventOnNode.toEventListener] event=onNodeReadyEvent, target=pcd:portal_content/every_user/general/defaultAjaxframeworkContent/com.sap.portal.contentarea, operation failed for com.sap.portal.prt.pom.PortalNode@53eae36f
  [EXCEPTION]
  java.lang.NullPointerException
  at java.util.Hashtable.put(Hashtable.java:459)"
• You receive a blank screen similar to the below:
  
• This blank screen will appear for most or all tabs available inside of your Portal

• SAP NetWeaver Application Server for Java 7.3x and higher releases
• Enterprise Portal

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