Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraint" not found in /home/commyhos/public_html/drupal11.com.myhost.id/d11d2/vendor/symfony/validator/Constraints/Yaml.php:23 Stack trace: #0 {main} thrown in /home/commyhos/public_html/drupal11.com.myhost.id/d11d2/vendor/symfony/validator/Constraints/Yaml.php on line 23