Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in C:\laragon\www\siesicis\ovh-sms\vendor\symfony\validator\Constraints\Isbn.php:24 Stack trace: #0 {main} thrown in C:\laragon\www\siesicis\ovh-sms\vendor\symfony\validator\Constraints\Isbn.php on line 24