Fatal error: Uncaught Error: Class "Symfony\Component\Validator\ConstraintValidator" not found in /home/dwtechco/public_html/vendor/zikula/coreinstaller-bundle/Validator/Constraints/ValidPdoConnectionValidator.php:23 Stack trace: #0 {main} thrown in /home/dwtechco/public_html/vendor/zikula/coreinstaller-bundle/Validator/Constraints/ValidPdoConnectionValidator.php on line 23