Fatal error: Uncaught Error: Class "Doctrine\DBAL\Exception\ServerException" not found in /home/keshavvps/public_html/keshav/KG1/HAR/vendor/doctrine/dbal/src/Exception/ConstraintViolationException.php:10 Stack trace: #0 {main} thrown in /home/keshavvps/public_html/keshav/KG1/HAR/vendor/doctrine/dbal/src/Exception/ConstraintViolationException.php on line 10