Fatal error: Uncaught Error: Class "Doctrine\DBAL\Schema\Visitor\AbstractVisitor" not found in /home/demohost/hospital.demohost.in/vendor/doctrine/dbal/src/Schema/Visitor/Graphviz.php:19 Stack trace: #0 {main} thrown in /home/demohost/hospital.demohost.in/vendor/doctrine/dbal/src/Schema/Visitor/Graphviz.php on line 19