Caused by: java.lang.NullPointerException
	at org.ametys.web.repository.dom.PagesContainerElement.<init>(PagesContainerElement.java:73)
	at org.ametys.web.repository.dom.SitemapElement.<init>(SitemapElement.java:56)
	at org.ametys.web.repository.dom.SitemapElement.<init>(SitemapElement.java:43)
	at org.ametys.web.transformation.xslt.AmetysXSLTHelper.sitemap(AmetysXSLTHelper.java:380)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.xalan.extensions.ExtensionHandlerJavaClass.callFunction(ExtensionHandlerJavaClass.java:367)