Fatal error: Class 'Doctrine\DBAL\Schema\Visitor\AbstractVisitor' not found in /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Visitor/DropSchemaSqlCollector.php on line 36

Call Stack:
    0.0006     249064   1. {main}() /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Visitor/DropSchemaSqlCollector.php:0