2195108 - Portal runtime error while working with Java Workflow Content

While navigating to Content Administration->Workflow Content->Workflow Templates/Workflow Instances/Work Items/Workflow Tasks throws portal runtime error in SAP NetWeaver 7.31 SP6

EXCEPTION found in trace:

com.sapportals.portal.prt.component.PortalComponentException: Error in service call of Portal Component

Application name : com.sap.workflow.admin.item_jwf

Component : pcd:portal_content/administrator/super_admin/super_admin_role/com.sap.portal.content_administration/com.sap.portal.content_admin_ws/com.sap.workflow.WF/com.sap.workflow.WFItems/com.sap.workflow.WFAdmin_item

Component class : com.sap.workflow.admin.iview.WFAdmin_item

Caused by: java.lang.NullPointerException: while trying to invoke the method com.sap.workflow.admin.clientbean.api.IWFCWorkitem.setUser(com.sap.security.api.IUser) of an object loaded from field com.sap.workflow.admin.iview.WFAdmin_item$WFAdminItemDynPage.cWorkitem of an object loaded from local variable 'this'

•  SAP enhancement package 1 for SAP NetWeaver 7.3

 Enterprise Portal 7.31, EP 7.31,task,id,java workflow,template,user,error , KBA , EP-BC-UWL , Universal Worklist , Problem