Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Constraint' not found in C:\Landaweb\webs\server\vendor\symfony\doctrine-bridge\Validator\Constraints\UniqueEntity.php:24 Stack trace: #0 {main} thrown in C:\Landaweb\webs\server\vendor\symfony\doctrine-bridge\Validator\Constraints\UniqueEntity.php on line 24