Fatal error: Uncaught Error: Class "Doctrine\DBAL\Connection" not found in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Portability/Connection.php:20 Stack trace: #0 {main} thrown in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Portability/Connection.php on line 20