Catchable fatal error: Argument 2 passed to OntoWiki_Model_Instances::__construct() must be an instance of Erfurt_Rdf_Model, null given, called in /var/www/trunk.ontowiki.net/application/classes/OntoWiki/Controller/Plugin/ListSetupHelper.php on line 79 and defined in /var/www/trunk.ontowiki.net/application/classes/OntoWiki/Model/Instances.php on line 85