Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in /home/ntpcbgtpp/public_html/mat1/src/Validator/Constraints/UniqueObjectCollection.php:29 Stack trace: #0 {main} thrown in /home/ntpcbgtpp/public_html/mat1/src/Validator/Constraints/UniqueObjectCollection.php on line 29