with sitemap category

org.ametys.plugins.repository.AmetysRepositoryException: An object id must conform to the <protocol>://<protocol-specific-part> syntax: provider_org.ametys.plugins.newsletter.category.SitemapCategoryProvider
at org.ametys.plugins.repository.AmetysObjectResolver.resolveById(AmetysObjectResolver.java:229)
at org.ametys.plugins.newsletter.category.JCRCategoryProvider.hasCategory(JCRCategoryProvider.java:177)
at org.ametys.plugins.newsletter.workflow.SendNewsletterFunction._getCategory(SendNewsletterFunction.java:247)
at org.ametys.plugins.newsletter.workflow.SendNewsletterFunction._getSubscribersOfParentCategories(SendNewsletterFunction.java:139)
at org.ametys.plugins.newsletter.workflow.SendNewsletterFunction.execute(SendNewsletterFunction.java:91)
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.ametys.runtime.plugin.component.PluginsComponentManager$ComponentInvocationHandler.invoke(PluginsComponentManager.java:159)
at $Proxy3.execute(Unknown Source)