Fatal error: Uncaught Error: Class "Symfony\Component\Validator\ConstraintValidator" not found in C:\laragon\www\djben\socialmedia\vendor\symfony\validator\Constraints\IsbnValidator.php:28 Stack trace: #0 {main} thrown in C:\laragon\www\djben\socialmedia\vendor\symfony\validator\Constraints\IsbnValidator.php on line 28