org.apache.cocoon.ProcessingException: Validation Exception Message at <map:serialize type="xml"> - file:///var/www/vhosts/digitalhumanities.org/dhq/tomcat/webapps/cocoon/samples/errorhandling/internal/sitemap.xmap:55:36 at <map:generate type="exception"> - file:///var/www/vhosts/digitalhumanities.org/dhq/tomcat/webapps/cocoon/samples/errorhandling/internal/sitemap.xmap:54:58