Fatal error: Uncaught Error: Class "Doctrine\ORM\Query\Exec\AbstractSqlExecutor" not found in /var/www/html/festival/vendor/doctrine/orm/src/Query/Exec/SingleSelectExecutor.php:17 Stack trace: #0 {main} thrown in /var/www/html/festival/vendor/doctrine/orm/src/Query/Exec/SingleSelectExecutor.php on line 17