Hi All, I have migrated from Guvnor 5.1.1 to Guvnor 5.3.3.Final. I am logging using SSO. I am getting the bellow error message on the UI when i try to login. java.lang.NullPointerException at org.drools.guvnor.server.util.LoggingHelper.error(LoggingHelper.java:76) at org.drools.guvnor.server.SecurityServiceServlet.doUnexpectedFailure(SecurityServiceServlet.java:55) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:67) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at org.jboss.seam.web.ContextFilter$1.process(ContextFilter.java:42) at org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:65) at org.jboss.seam.web.ContextFilter.doFilter(ContextFilter.java:37) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) at weblogic.work.ExecuteThread.run(ExecuteThread.java:178) In Application Server, i can see the below error. ERROR 05-08 07:07:30,903 (LoggingHelper.java:error:74) Type '[Lorg.drools.guvnor.client.configurations.Capability;' was not assignable to 'com.google.gwt.user.client.rpc.IsSerializable' and did not have a custom field serializer.For security purposes, this type will not be serialized.: instance = [Lorg.drools.guvnor.client.configurations.Capability;@256c0579 <Aug 5, 2014 7:07:30 AM PDT> <Error> <HTTP> <BEA-101017> <[ServletContext@626550860[app:drools-guvnor module:drools-guvnor.war path:/drools-guvnor spec-version:2.5], request: weblogic.servlet.internal.ServletRequestImpl@20c579cd[ Any thought/suggestion on this? Regards, Lakshmi Reddy