java.lang.reflect.InvocationTargetException, Cause Exception: java.lang.reflect.InvocationTargetException, Root Cause Exception: java.lang.NullPointerException
	at com.yell.framework.core.reflection.ReflectionControler.invokeMethod(ReflectionControler.java:621)
	at com.yell.framework.web.mvc.impl.modules.MethodInvokerModule.execute(MethodInvokerModule.java:58)
	at com.yell.framework.web.mvc.impl.modules.RedirectModule.executeExpression(RedirectModule.java:64)
	at com.yell.framework.web.mvc.impl.modules.RedirectModule.execute(RedirectModule.java:27)
	at com.yell.framework.web.mvc.impl.ModuleModelInvoker.processModel(ModuleModelInvoker.java:82)
	at com.yell.framework.web.servlets.MVCControler.doGet(MVCControler.java:506)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:592)
	at com.yell.framework.core.reflection.ReflectionControler.invokeMethod(ReflectionControler.java:616)
	... 23 more
Caused by: java.lang.NullPointerException
	at com.yell.mobileweb.utils.BrowserDeviceServices.getRedirectUrl(BrowserDeviceServices.java:74)
	... 28 more