Fatal error: Uncaught Error: Interface 'Symfony\Component\Validator\ValidatorBuilderInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/validator/ValidatorBuilder.php:52 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/validator/ValidatorBuilder.php on line 52