After restart of windchill server, we are facing issue, Windchill blue screen is coming no navigation bar is seen?

After restart of windchill server, we are facing issue, Windchill blue screen is coming no navigation bar is seen?

attached is log file

2016-10-31 15:13:56,897 INFO  [NmActionService.initXml] com.ptc.netmarkets.util.misc.StandardNmActionService.xmlInit  - Started initializeXML()

2016-10-31 15:13:59,129 WARN  [NmActionService.initXml] wt.method.server  - Uncaught exception on thread: "NmActionService.initXml" [id=35]

java.lang.ArrayIndexOutOfBoundsException: 7602276

at java.util.ArrayList.elementData(ArrayList.java:409)

at java.util.ArrayList.get(ArrayList.java:422)

at org.apache.xerces.dom.DeepNodeListImpl.item(Unknown Source)

at org.apache.xerces.dom.DeepNodeListImpl.getLength(Unknown Source)

at com.ptc.netmarkets.util.misc.StandardNmActionService.getNewAction(StandardNmActionService.java:2010)

at com.ptc.netmarkets.util.misc.StandardNmActionService.parseActionXML(StandardNmActionService.java:1409)

at com.ptc.netmarkets.util.misc.StandardNmActionService.initializeXML(StandardNmActionService.java:3160)

at com.ptc.netmarkets.util.misc.StandardNmActionService$1.run(StandardNmActionService.java:455)

2016-10-31 15:13:59,563 INFO  [main] wt.method.server.startup  - Classification Service started successfully.

2016-10-31 15:14:16,018 INFO  [main] wt.pom.statementCache.summary  - StatementCache: wt.util.Cache%20842947 [size=50, count=50, hits=4001, misses=225, overflows=173]

2016-10-31 15:14:16,644 INFO  [commonScheduleQueue.SchedulingThread] wt.pds.passwordexpiry.PasswordExpiryWarningService Administrator - Datastore password expiry warnings will commence 15 days in advance of expiration. (Configurable via property: wt.pds.passwordExpirationChecking.days)

31 15:14:44,438 INFO  [localhost-startStop-1] org.springframework.web.servlet.DispatcherServlet  - FrameworkServlet 'MVCDispatcher': initialization started

2016-10-31 15:15:19,391 INFO  [localhost-startStop-1] org.springframework.web.servlet.DispatcherServlet  - FrameworkServlet 'MVCDispatcher': initialization completed in 34952 ms

2016-10-31 15:15:19,500 INFO  [Servlet engine main] com.ptc.tomcat.embedded.Bootstrap  - Servlet engine ready; catalina.base=/opt/ptc/Windchill_10.2/Windchill/tomcat/instances/instance-8010

2016-10-31 15:15:19,502 INFO  [main] wt.method.server.startup  - MethodServer ready (in 192.159 secs).

2016-10-31 15:15:19,502 WARN  [main] wt.method.server.startup  -

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JMX-Administrators EMAIL LIST HAS NOT BEEN POPULATED!

SYSTEM HEALTH NOTIFICATIONS WILL NOT BE SENT!

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2016-10-31 15:15:26,784 ERROR [ajp-bio-8010-exec-1] com.ptc.jca.navigation orgadmin - problem getting the main navigation action model

(com.ptc.netmarkets.util.misc.miscResource/400) com.ptc.netmarkets.model.NmException: actionmodels.xml file is missing an entry called navigator.  Please add the model and restart the server.

at com.ptc.netmarkets.util.misc.StandardNmActionService.getActionModelFromNameToModelMap(StandardNmActionService.java:4501)

at com.ptc.netmarkets.util.misc.StandardNmActionService.getActionModel(StandardNmActionService.java:563)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at wt.services.ServiceFactory$ServerInvocationHandler.invoke(ServiceFactory.java:399)

at com.sun.proxy.$Proxy52.getActionModel(Unknown Source)

at com.ptc.windchill.enterprise.navigation.delegates.DefaultNavigationListDelegate.getActionModel(DefaultNavigationListDelegate.java:229)

at com.ptc.windchill.enterprise.navigation.delegates.DefaultNavigationListDelegate.getJSONForShell(DefaultNavigationListDelegate.java:591)

at org.apache.jsp.WEB_002dINF.jsp.shell_jsp._jspService(shell_jsp.java:190)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at