org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor 'public org.sakaiproject.gradebookng.tool.pages.GradebookPage()'. An exception has been thrown during construction!
	at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:194)
	at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:67)
	at org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:133)
	at org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:268)
	at org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
	at org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
	at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:117)
	at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:229)
	at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175)
	at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:890)
	at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
	at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
	at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
	at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
	at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
	at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
	at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:137)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:670)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:450)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:353)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313)
	at org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:508)
	at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1482)
	at org.sakaiproject.portal.charon.handlers.SiteHandler.doToolBuffer(SiteHandler.java:1318)
	at org.sakaiproject.portal.charon.handlers.SiteHandler.bufferContent(SiteHandler.java:1152)
	at org.sakaiproject.portal.charon.handlers.SiteHandler.doSite(SiteHandler.java:522)
	at org.sakaiproject.portal.charon.handlers.SiteHandler.doGet(SiteHandler.java:287)
	at org.sakaiproject.portal.charon.handlers.SiteHandler.doGet(SiteHandler.java:185)
	at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:817)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:670)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:500)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:433)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:175)
	... 62 more
Caused by: java.lang.ArrayIndexOutOfBoundsException