Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\ConstraintValidator' not found in /home/devmecseminars/public_html/mec/vendor/symfony/validator/Constraints/IsTrueValidator.php:21
Stack trace:
#0 {main}
thrown in /home/devmecseminars/public_html/mec/vendor/symfony/validator/Constraints/IsTrueValidator.php on line 21