Fatal error: Uncaught Error: Interface "Onoi\EventDispatcher\EventListenerCollection" not found in /home/hiphopdi/public_html/wiki2/extensions/SemanticMediaWiki/src/Listener/EventListener/EventListenerRegistry.php:20 Stack trace: #0 {main} thrown in /home/hiphopdi/public_html/wiki2/extensions/SemanticMediaWiki/src/Listener/EventListener/EventListenerRegistry.php on line 20