I am getting following error on registration page submit action
[EXCEPTION]
java.lang.NullPointerException: while trying to invoke the method com.sap.wec.app.common.module.businesspartner.businessobject.interf.BusinessPartner.getTechKey() of an object returned from com.sap.wec.app.common.module.businesspartner.businessobject.interf.BusinessPartnerManager.getDefaultBusinessPartner(java.lang.String)
at com.sap.wec.app.emarketing.module.loyalty.businessobject.impl.LoyaltyManagerImpl.createMembership(LoyaltyManagerImpl.java:85)
at com.sap.wec.app.emarketing.module.loyalty.plugin.impl.UserRegistrationPlugInLoyaltyImpl.triggerLoyaltyRegistrationAction(UserRegistrationPlugInLoyaltyImpl.java:67)
at com.sap.wec.app.emarketing.module.loyalty.plugin.impl.UserRegistrationPlugInLoyaltyImpl.triggerPostRegistrationActions(UserRegistrationPlugInLoyaltyImpl.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sap.wec.tc.core.modulemgmt.plugin.PluginProxy.invoke(PluginProxy.java:43)
at $Proxy2815.triggerPostRegistrationActions(Unknown Source)
at com.sap.wec.app.common.module.user.ui.user.register.vc.impl.RegistrationMasterVCHandlerJSF.triggerPostRegistrationActions(RegistrationMasterVCHandlerJSF.java:259)
at com.sap.wec.app.common.module.user.ui.user.register.vc.impl.RegistrationMasterVCHandlerJSF.register(RegistrationMasterVCHandlerJSF.java:218)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.el.parser.AstValue.invoke(AstValue.java:187)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
at org.apache.myfaces.view.facelets.el.LocationMethodExpression.invoke(LocationMethodExpression.java:95)
at org.apache.myfaces.view.facelets.el.ContextAwareTagMethodExpression.invoke(ContextAwareTagMethodExpression.java:96)
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:83)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:51)
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:419)