The filter 'focus' has a null content collectionFailed to process pipeline<map:serialize type="xml"><map:generate type="inputdata"><map:serialize type="xhtml"><map:transform type="i18n"><map:transform>
java.lang.IllegalStateException: The filter 'focus' has a null content collection at org.ametys.web.filter.DefaultWebContentFilter.getMatchingContents(DefaultWebContentFilter.java:205) 
at org.ametys.web.filter.ContentFilterHelper.saxMatchingContents(ContentFilterHelper.java:86) 
at org.ametys.web.tags.inputdata.FilteredContentsInputData.saxFilter(FilteredContentsInputData.java:163)
 at org.ametys.web.tags.inputdata.FilteredContentsInputData.toSAX(FilteredContentsInputData.java:86)
 at org.ametys.web.inputdata.DefaultInputDataManager.toSAX(DefaultInputDataManager.java:75) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) 
at org.ametys.runtime.plugin.component.PluginsComponentManager$ComponentInvocationHandler.invoke(PluginsComponentManager.java:159) 
at $Proxy10.toSAX(Unknown Source) at org.ametys.web.inputdata.InputDataGenerator.generate(InputDataGenerator.java:44)