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Screen Render Error

java.lang.NullPointerException
	at org.ofbiz.widget.tree.ModelTree$ModelNode.renderNodeString(ModelTree.java:387)
	at org.ofbiz.widget.tree.ModelTree.renderTreeString(ModelTree.java:257)
	at org.ofbiz.widget.screen.ModelScreenWidget$Tree.renderWidgetString(ModelScreenWidget.java:992)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorSection.renderWidgetString(ModelScreenWidget.java:761)
	at org.ofbiz.widget.screen.ModelScreenWidget$SectionsRenderer.render(ModelScreenWidget.java:171)
	at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorSectionInclude.renderWidgetString(ModelScreenWidget.java:793)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:300)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorSection.renderWidgetString(ModelScreenWidget.java:761)
	at org.ofbiz.widget.screen.ModelScreenWidget$SectionsRenderer.render(ModelScreenWidget.java:171)
	at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorSectionInclude.renderWidgetString(ModelScreenWidget.java:793)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:300)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:300)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:232)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:232)
	at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:398)
	at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorScreen.renderWidgetString(ModelScreenWidget.java:729)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:232)
	at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:398)
	at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorScreen.renderWidgetString(ModelScreenWidget.java:729)
	at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:141)
	at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:232)
	at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:398)
	at org.ofbiz.widget.screen.ScreenRenderer.render(ScreenRenderer.java:134)
	at org.ofbiz.widget.screen.ScreenRenderer.render(ScreenRenderer.java:95)
	at org.ofbiz.widget.screen.MacroScreenViewHandler.render(MacroScreenViewHandler.java:105)
	at org.ofbiz.webapp.control.RequestHandler.renderView(RequestHandler.java:849)
	at org.ofbiz.webapp.control.RequestHandler.doRequest(RequestHandler.java:562)
	at org.ofbiz.webapp.control.ControlServlet.doGet(ControlServlet.java:228)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.ofbiz.webapp.control.ContextFilter.doFilter(ContextFilter.java:270)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)