Fatal error: Class 'Doctrine\DBAL\Schema\Synchronizer\AbstractSchemaSynchronizer' not found in /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/SQLAzure/SQLAzureFederationsSynchronizer.php on line 41

Call Stack:
    0.0011     290392   1. {main}() /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/SQLAzure/SQLAzureFederationsSynchronizer.php:0