Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Constraint' not found in /home/almasai/www/people/_old_site/vendor/symfony/src/Symfony/Component/Validator/Constraints/Collection.php:21 Stack trace: #0 {main} thrown in /home/almasai/www/people/_old_site/vendor/symfony/src/Symfony/Component/Validator/Constraints/Collection.php on line 21