How to reproduce it :

• On 4.5 project, add this to ivy.xml

  <dependency org="org.ametys.plugins" name="data-filler" branch="1.5.x" conf="web_compile_dependencies->compile_dependencies,runtime-except-ametys-dependencies;web_runtime_dependencies->runtime-except-ametys-dependencies;web_compile,web_runtime->runtime" rev="latest.milestone"/> 

• Resolve ivy
• the data-filler jar is loaded
• in the CMS, developper tab, clic on Create test pages
  > there is errors and lot of contents are not created (see screenshot)

  Date : 14/03 15:51:06.648
  Utilisateur : laure#users
  Thread : Thread[http-nio-10033-exec-8,5,main]
  Niveau : ERROR
  Catégorie : org.ametys.plugins.datafiller.DataFiller
  URI de la requête : /cms/plugins/core-ui/servercomm/messages.xml
  Message : An error occurred: failed to create content and add them to test pages
  Emplacement : org.ametys.plugins.datafiller.CreateTestPageManager._createTestContentPages(CreateTestPageManager.java:234)
  
  Pile d'appels :
  java.lang.NullPointerException
  at org.ametys.cms.FilterNameHelper#filterName:50
  at org.ametys.web.repository.page.PageDAO#createPage:567
  at org.ametys.plugins.datafiller.SitemapPopulator#_createPage:259
  at org.ametys.plugins.datafiller.SitemapPopulator#getOrCreatePage:219
  at org.ametys.plugins.datafiller.SitemapPopulator#getOrCreatePage:201
  at org.ametys.plugins.datafiller.GenericContentCreationManager#_createPagesForContent:881
  at org.ametys.plugins.datafiller.GenericContentCreationManager#createGenericContentPages:195
  at org.ametys.plugins.datafiller.CreateTestPageManager#_createTestContentPages:230
  at org.ametys.plugins.datafiller.CreateTestPageManager#createTestPages:165
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl#invoke0 (Native Method)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl#invoke:62
  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl#invoke:43
  at java.base/java.lang.reflect.Method#invoke:566
  at org.ametys.core.ui.ExecuteClientCallsAction#_executeMethod:204
  at org.ametys.core.ui.ExecuteClientCallsAction#act:182
  at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode#invoke:120
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:47
  at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode#invoke:108
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode#invoke:143
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode#invoke:93
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:236
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#buildPipeline:194
  at org.apache.cocoon.components.treeprocessor.TreeProcessor#buildPipeline:267
  at org.apache.cocoon.components.treeprocessor.sitemap.MountNode#invoke:111
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:47
  at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode#invoke:108
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode#invoke:143
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode#invoke:93
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:236
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#buildPipeline:194
  at org.apache.cocoon.components.treeprocessor.TreeProcessor#buildPipeline:267
  at org.apache.cocoon.components.source.impl.SitemapSource#init:333
  at org.apache.cocoon.components.source.impl.SitemapSource#<init>:215
  at org.apache.cocoon.components.source.impl.SitemapSourceFactory#getSource:68
  at org.apache.excalibur.source.impl.SourceResolverImpl#resolveURI:208
  at org.apache.cocoon.components.CocoonComponentManager#resolveURI:558
  at org.apache.cocoon.components.CocoonComponentManager#resolveURI:558
  at org.apache.cocoon.components.CocoonComponentManager#resolveURI:558
  at org.apache.cocoon.components.CocoonComponentManager#resolveURI:558
  at org.ametys.core.ui.dispatcher.DispatchGenerator#_dispatching:153
  at org.ametys.core.ui.dispatcher.DispatchGenerator#generate:95
  at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline#processXMLPipeline:581
  at org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline#processXMLPipeline:301
  at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline#process:483
  at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode#invoke:144
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:47
  at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode#invoke:108
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode#invoke:143
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode#invoke:93
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:236
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:178
  at org.apache.cocoon.components.treeprocessor.TreeProcessor#process:254
  at org.apache.cocoon.components.treeprocessor.sitemap.MountNode#invoke:118
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:47
  at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode#invoke:108
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode#invoke:143
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode#invoke:93
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:236
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:178
  at org.apache.cocoon.components.treeprocessor.TreeProcessor#process:254
  at org.apache.cocoon.components.treeprocessor.sitemap.MountNode#invoke:118
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:47
  at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode#invoke:108
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode#invoke:143
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode#invoke:93
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:236
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:178
  at org.apache.cocoon.components.treeprocessor.TreeProcessor#process:254
  at org.apache.cocoon.components.treeprocessor.sitemap.MountNode#invoke:118
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:47
  at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode#invoke:108
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode#invoke:143
  at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode#invokeNodes:69
  at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode#invoke:93
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:236
  at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor#process:178
  at org.apache.cocoon.components.treeprocessor.TreeProcessor#process:254
  at org.apache.cocoon.Cocoon#process:699
  at org.ametys.runtime.servlet.RuntimeServlet#service:580
  at javax.servlet.http.HttpServlet#service:741
  at org.apache.catalina.core.ApplicationFilterChain#internalDoFilter:231
  at org.apache.catalina.core.ApplicationFilterChain#doFilter:166
  at org.apache.tomcat.websocket.server.WsFilter#doFilter:53
  at org.apache.catalina.core.ApplicationFilterChain#internalDoFilter:193
  at org.apache.catalina.core.ApplicationFilterChain#doFilter:166
  at org.apache.catalina.core.StandardWrapperValve#invoke:202
  at org.apache.catalina.core.StandardContextValve#invoke:96
  at org.apache.catalina.authenticator.AuthenticatorBase#invoke:490
  at org.apache.catalina.core.StandardHostValve#invoke:139
  at org.apache.catalina.valves.ErrorReportValve#invoke:92
  at org.apache.catalina.valves.AbstractAccessLogValve#invoke:678
  at org.apache.catalina.core.StandardEngineValve#invoke:74
  at org.apache.catalina.connector.CoyoteAdapter#service:343
  at org.apache.coyote.http11.Http11Processor#service:408
  at org.apache.coyote.AbstractProcessorLight#process:66
  at org.apache.coyote.AbstractProtocol$ConnectionHandler#process:853
  at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor#doRun:1587
  at org.apache.tomcat.util.net.SocketProcessorBase#run:49
  at java.base/java.util.concurrent.ThreadPoolExecutor#runWorker:1128
  at java.base/java.util.concurrent.ThreadPoolExecutor$Worker#run:628
  at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable#run:61
  at java.base/java.lang.Thread#run:834