java.lang.IncompatibleClassChangeError: Expected non-static field com.thelevel.rmv.booking.UpdateAccount.bookingXmlLogger
	at com.thelevel.rmv.booking.UpdateAccount.getXML(UpdateAccount.java:55)
	at com.thelevel.portal.client.CustomXMLSource.getXML(CustomXMLSource.java:170)
	at com.thelevel.portal.client.CustomXMLSource.getXML(CustomXMLSource.java:179)
	at com.thelevel.cms.site.PageRule.handleRequest(PageRule.java:231)
	at com.thelevel.cms.site.CMSSiteHandler.handleRequest(CMSSiteHandler.java:479)
	at com.thelevel.cms.site.CMSSiteHandler.handleRequest(CMSSiteHandler.java:430)
	at com.thelevel.cms.site.SiteServlet.processRequest(SiteServlet.java:405)
	at com.thelevel.cms.site.SiteServlet.instrumentRequest(SiteServlet.java:211)
	at com.thelevel.cms.site.SiteServlet.filterRequest(SiteServlet.java:165)
	at com.thelevel.cms.site.SiteServlet.service(SiteServlet.java:115)
	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.thelevel.cms.location.LocationFilter.doFilter(LocationFilter.java:56)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.thelevel.cms.identity.AuthFilter.doFilter(AuthFilter.java:99)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.picocontainer.web.PicoServletContainerFilter.doFilter(PicoServletContainerFilter.java:74)
	at com.thelevel.cms.CMSBootstrapper$ServletFilter.doFilter(CMSBootstrapper.java:646)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:662)