Fatal error: Uncaught Error: Interface "MediaWiki\Deferred\DeferrableUpdate" not found in /home/floten1/q.tenbergen.ca/extensions/Echo/includes/DeferredMarkAsDeletedUpdate.php:15 Stack trace: #0 {main} thrown in /home/floten1/q.tenbergen.ca/extensions/Echo/includes/DeferredMarkAsDeletedUpdate.php on line 15