Fatal error: Class 'Doctrine\DBAL\Schema\Synchronizer\AbstractSchemaSynchronizer' not found in /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Synchronizer/SingleDatabaseSynchronizer.php on line 33

Call Stack:
    0.0005     264072   1. {main}() /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Synchronizer/SingleDatabaseSynchronizer.php:0