Fatal error: Uncaught Error: Interface "MediaWiki\Installer\Hook\LoadExtensionSchemaUpdatesHook" not found in /var/www/html/extensions/FlaggedRevs/includes/backend/schema/FlaggedRevsUpdaterHooks.php:10 Stack trace: #0 {main} thrown in /var/www/html/extensions/FlaggedRevs/includes/backend/schema/FlaggedRevsUpdaterHooks.php on line 10