WARN http-apr-8082-exec-402 org.sakaiproject.cheftool.VelocityPortletPaneledAction - Exception calling method doUpload_all java.lang.reflect.InvocationTargetException (Caused by java.lang.NumberFormatException: For input string: "2020-03-06T16:10:21Z")
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.sakaiproject.cheftool.VelocityPortletPaneledAction.actionDispatch(VelocityPortletPaneledAction.java:757)
        at org.sakaiproject.cheftool.VelocityPortletPaneledAction.processAction(VelocityPortletPaneledAction.java:569)
        at org.sakaiproject.cheftool.ToolServlet.doGet(ToolServlet.java:228)
        at org.sakaiproject.cheftool.VelocityPortletPaneledAction.doGet(VelocityPortletPaneledAction.java:1169)
        at org.sakaiproject.cheftool.ToolServlet.doPost(ToolServlet.java:152)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
        at org.sakaiproject.vm.ComponentServlet.service(ComponentServlet.java:56)
        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: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:352)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
        at org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:513)
        at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1489)
        at org.sakaiproject.portal.charon.handlers.SiteHandler.doToolBuffer(SiteHandler.java:1231)
        at org.sakaiproject.portal.charon.handlers.SiteHandler.bufferContent(SiteHandler.java:1065)
        at org.sakaiproject.portal.charon.handlers.SiteHandler.doSite(SiteHandler.java:491)
        at org.sakaiproject.portal.charon.handlers.SiteHandler.doGet(SiteHandler.java:267)
        at org.sakaiproject.portal.charon.handlers.SiteHandler.doGet(SiteHandler.java:155)
        at org.sakaiproject.portal.charon.handlers.WorksiteHandler.doPost(WorksiteHandler.java:69)
        at org.sakaiproject.portal.charon.SkinnableCharonPortal.doPost(SkinnableCharonPortal.java:1171)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
        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:200)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
        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:679)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
        at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2079)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$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)
Caused by: java.lang.NumberFormatException: For input string: "2020-03-06T16:10:21Z"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Long.parseLong(Long.java:589)
        at java.lang.Long.parseLong(Long.java:631)
        at org.sakaiproject.assignment.tool.AssignmentAction.uploadAll_updateSubmissions(AssignmentAction.java:13757)
        at org.sakaiproject.assignment.tool.AssignmentAction.doUpload_all(AssignmentAction.java:13273)
        ... 56 more