(from Jesus Maria Mendez Perez ) Hi Curtis, In our 20.0 instance we have some similar error. usage-session: 209addba-4714-43c6-bb9b-8657b56263e9 stack-trace-digest: 4E16314E86DEE201B52DB62BEB74E0A04E5F4EED sakai-version: 20.0 (9a06888e) service-version: AV app-server: prod_14_1 user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36 browser-id: Win-Mozilla IP: 37.132.108.55 request-path: /portal/tool/1ee9e9f8-e2bf-482e-a36d-538b1d6ab320/jsf/delivery/deliverAssessment hora: 22-sep-2020 16:00:59 CEST traza de la pila: org.sakaiproject.portal.api.PortalHandlerException: org.sakaiproject.tool.api.ToolException: org.apache.jasper.JasperException: Ha sucedido una excepción al procesar la página JSP [jsf/delivery/deliverAssessment.jsp] en línea [261] 258: 259: 260: 261: 262: 263: 264: Stacktrace: at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:857) caused by: org.sakaiproject.tool.api.ToolException: org.apache.jasper.JasperException: Ha sucedido una excepción al procesar la página JSP [jsf/delivery/deliverAssessment.jsp] en línea [261] 258: 259: 260: 261: 262: 263: 264: Stacktrace: at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1500) caused by: org.apache.jasper.JasperException: Ha sucedido una excepción al procesar la página JSP [jsf/delivery/deliverAssessment.jsp] en línea [261] 258: 259: 260: 261: 262: 263: 264: Stacktrace: at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:515) caused by: javax.el.ELException: Error reading [retractDate] en el tipo [org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean] at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:125) caused by: java.lang.NullPointerException at org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean.isAcceptLateSubmission(DeliveryBean.java:2091) at org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean.getRetractDate(DeliveryBean.java:616) at sun.reflect.GeneratedMethodAccessor2253.invoke(null:-1) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at javax.el.BeanELResolver.getValue(BeanELResolver.java:94) at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:125) at org.apache.el.parser.AstValue.getValue(AstValue.java:169) at org.apache.el.parser.AstEmpty.getValue(AstEmpty.java:46) at org.apache.el.parser.AstNot.getValue(AstNot.java:43) at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:190) at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:701) at org.apache.jsp.jsf.delivery.deliverAssessment_jsp._jspx_meth_c_005fif_005f1(deliverAssessment_jsp.java:2624) at org.apache.jsp.jsf.delivery.deliverAssessment_jsp._jspx_meth_h_005fform_005f1(deliverAssessment_jsp.java:1931) at org.apache.jsp.jsf.delivery.deliverAssessment_jsp._jspService(deliverAssessment_jsp.java:774) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:71) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:477) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:426) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:791) at com.sun.faces.application.view.JspViewHandlingStrategy.executePageToBuildView(JspViewHandlingStrategy.java:380) at com.sun.faces.application.view.JspViewHandlingStrategy.buildView(JspViewHandlingStrategy.java:130) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:102) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:223) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:671) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:426) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) at org.sakaiproject.jsf.util.SamigoJsfTool.dispatch(SamigoJsfTool.java:360) at org.sakaiproject.jsf2.util.JsfTool.doGet(JsfTool.java:235) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:352) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) at org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:508) at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1500) at org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:200) at org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96) at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:857) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:475) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:747) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)