Fatal error: Uncaught Error: Interface "MediaWiki\Extension\UserMerge\Hooks\AccountFieldsHook" not found in /var/www/html/extensions/AbuseFilter/includes/Hooks/Handlers/UserMergeHandler.php:8 Stack trace: #0 {main} thrown in /var/www/html/extensions/AbuseFilter/includes/Hooks/Handlers/UserMergeHandler.php on line 8