Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Constraint' not found in C:\SistemasPHP\ccp\vendor\symfony\form\Extension\Validator\Constraints\Form.php:19 Stack trace: #0 {main} thrown in C:\SistemasPHP\ccp\vendor\symfony\form\Extension\Validator\Constraints\Form.php on line 19