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java.lang.NullPointerException: 	at java.util.regex.Matcher.getTextLength(Matcher.java:1140)	at java.util.regex.Matcher.reset(Matcher.java:291)	at java.util.regex.Matcher.(Matcher.java:211)	at java.util.regex.Pattern.matcher(Pattern.java:888)	at org.jasig.cas.services.web.ServiceThemeResolver.resolveThemeName_aroundBody0(ServiceThemeResolver.java:54)	at org.jasig.cas.services.web.ServiceThemeResolver.resolveThemeName_aroundBody1$advice(ServiceThemeResolver.java:44)	at org.jasig.cas.services.web.ServiceThemeResolver.resolveThemeName(ServiceThemeResolver.java:1)	at org.springframework.web.servlet.support.RequestContextUtils.getTheme(RequestContextUtils.java:147)	at org.springframework.web.servlet.support.RequestContext.getTheme(RequestContext.java:328)	at org.springframework.web.servlet.tags.ThemeTag.getMessageSource(ThemeTag.java:50)	at org.springframework.web.servlet.tags.MessageTag.resolveMessage(MessageTag.java:193)	at org.springframework.web.servlet.tags.MessageTag.doStartTagInternal(MessageTag.java:165)	at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79)	at org.apache.jsp.WEB_002dINF.view.jsp.errors_jsp._jspx_meth_spring_005ftheme_005f0(errors_jsp.java:159)	at org.apache.jsp.WEB_002dINF.view.jsp.errors_jsp._jspService(errors_jsp.java:86)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:438)	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)	at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:421)	at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:342)	at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:286)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:347)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:776)	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:705)	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:898)	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)	at java.lang.Thread.run(Thread.java:662)