Blank Browser Screen when logging into ZCC after Upgrading to 11.2.4

Upgrade to ZENworks 11.2.4 completed successfully
Blank browser screen seen after entering credentials to login to ZCC  (ZENworks Control Center)
The following error is seen in the zcc.log (full stack trace in Additional Information):

java.lang.NoSuchMethodException: com.novell.zenworks.fw.web.internal.Login.validateLanguageInput(java.lang.Object, com.novell.web.controls.ServerValidateEventArgs)

The following file should exist on the primary server:

Windows: %ZENWORKS_HOME%\share\tomcat\webapps\zenworks\WEB-INF\lib\zcc-framework.jar
Linux: /opt/novell/zenworks/share/tomcat/webapps/zenworks/WEB-INF/lib/zcc-framework.jar

When this issue was seen, there was an extra .jar file in the same directory:

Windows: %ZENWORKS_HOME%\share\tomcat\webapps\zenworks\WEB-INF\lib\zcc-framework-11.2.2.jar
Linux: /opt/novell/zenworks/share/tomcat/webapps/zenworks/WEB-INF/lib/zcc-framework-11.2.2.jar

Do the following to resolve the issue:

1. Stop the ZENworks services on the server
2. Remove the zcc-framework-11.2.2.jar from the ZENworks file structure
   
3. Start the ZENworks services again on the server

Full stack trace from zcc.log:

14 Nov 2013 10:00:12 ============== Exception (begin) ===========================
14 Nov 2013 10:00:12 Exception occured
java.lang.NoSuchMethodException: com.novell.zenworks.fw.web.internal.Login.validateLanguageInput(java.lang.Object, com.novell.web.controls.ServerValidateEventArgs)
    at java.lang.Class.getMethod(Class.java:1605)
    at com.novell.web.controls.CustomValidator.evaluateIsValid(CustomValidator.java:147)
    at com.novell.web.controls.BaseValidator.validate(BaseValidator.java:298)
    at com.novell.web.controls.Page.validate(Page.java:402)
    at com.novell.web.controls.BasePostbackControl.isRequestValid(BasePostbackControl.java:515)
    at com.novell.web.controls.Button.raisePostBackEvent(Button.java:471)
    at com.novell.web.controls.Page.raisePostBackEvent(Page.java:1102)
    at com.novell.web.controls.Page.raisePostBackEvents(Page.java:1059)
    at com.novell.web.controls.Page.internalProcessRequest(Page.java:724)
    at com.novell.web.controls.Page.processRequest(Page.java:668)
    at com.novell.web.internal.controls.PageTag.doEndTag(PageTag.java:86)
    at org.apache.jsp.jsp.fw.internal.Login_jsp._jspService(Login_jsp.java:433)
    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:377)
    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:436)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:342)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
    at com.novell.web.NJWCServlet.serviceImpl(NJWCServlet.java:97)
    at com.novell.zenworks.fw.web.internal.ZENworksServlet.service(ZENworksServlet.java:84)
    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 com.patchlink.sapphire.web.pages.vulnerability.session.HibernateSessionFilter.doFilter(HibernateSessionFilter.java:75)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at com.novell.zenworks.tomcat.ZENRequestValve.invoke(ZENRequestValve.java:1293)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:662)
14 Nov 2013 10:00:12

Exception Info:
14 Nov 2013 10:00:12     Class....... java.lang.NoSuchMethodException
14 Nov 2013 10:00:12     Message..... com.novell.zenworks.fw.web.internal.Login.validateLanguageInput(java.lang.Object, com.novell.web.controls.ServerValidateEventArgs)
14 Nov 2013 10:00:12     Logged at... Page................685 
14 Nov 2013 10:00:12 ============== Exception (end) =============================