Getting 'anti-cross-site-request-forgery token' error

Hi All,

we have currently upgraded from wm 7.1.3 to wm8.2 after the upgrade when trying to change the look n feel via sysadmin getting this error.
can any one help me on this ?

[RID:376] - [POP.007.0078] This action requires an anti-cross-site-request-forgery token.com.webmethods.portal.PortalException: [POP.007.0078] This action requires an anti-cross-site-request-forgery token. at com.webmethods.portal.framework.dispatch.util.AXSRFTDispatchUtils.checkToken(AXSRFTDispatchUtils.java:72) at com.webmethods.portal.framework.dispatch.util.AXSRFTDispatchUtils.checkToken(AXSRFTDispatchUtils.java:44) at com.webmethods.portal.framework.dispatch.DispatchManager.handle(DispatchManager.java:439) at com.webmethods.portal.framework.dispatch.DispatchManager.handleDispatch(DispatchManager.java:379) at com.webmethods.portal.framework.impl.PortalServlet.service(PortalServlet.java:280) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.webmethods.portal.framework.impl.NTLMFilter.doFilter(NTLMFilter.java:50) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.webmethods.caf.faces.servlet.GZIPFilter.doFilter(GZIPFilter.java:42) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:451)2012-05-15 15:49:37 EST (Framework:DEBUG) [RID:376] - Delegating to renderer: error