When opening development tools on chrome (on a front page),

following error is encountered : 

java.lang.IllegalArgumentException: This kind of selector only accepts Strings as hint values.
at org.ametys.runtime.plugin.component.AbstractSelectorExtensionPoint.select(AbstractSelectorExtensionPoint.java:36)
at org.apache.avalon.framework.service.WrapperServiceSelector.select(WrapperServiceSelector.java:82)
at org.apache.excalibur.source.impl.SourceResolverImpl.release(SourceResolverImpl.java:268)
at org.apache.cocoon.components.CocoonComponentManager.release(CocoonComponentManager.java:565)
at org.ametys.core.resources.ResourceReader.recycle(ResourceReader.java:106)