Type Exception Report
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
java.lang.NullPointerException org.zkoss.chart.demo.MainLayoutComposer.getVisitedUrls(MainLayoutComposer.java:505) org.zkoss.chart.demo.MainLayoutComposer.initSidebar(MainLayoutComposer.java:130) org.zkoss.chart.demo.MainLayoutComposer.doAfterCompose(MainLayoutComposer.java:108) org.zkoss.chart.demo.MainLayoutComposer.doAfterCompose(MainLayoutComposer.java:66) org.zkoss.zk.ui.impl.UiEngineImpl.doAfterCompose(UiEngineImpl.java:619) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:944) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:891) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:778) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:838) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:796) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:742) org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:463) org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:371) org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:220) org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:146) javax.servlet.http.HttpServlet.service(HttpServlet.java:635) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.zkoss.web.servlet.Servlets.forward(Servlets.java:925) org.zkoss.web.servlet.Servlets.forward(Servlets.java:933) org.zkoss.chart.demo.DemoEntryServiceFilter.doFilter(DemoEntryServiceFilter.java:50)
Note The full stack trace of the root cause is available in the server logs.