Fatal error: Uncaught Error: Class "Wikimedia\ParamValidator\TypeDef" not found in /var/www/html/orian-wiki/includes/libs/ParamValidator/TypeDef/PresenceBooleanDef.php:21 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/includes/libs/ParamValidator/TypeDef/PresenceBooleanDef.php on line 21