Fatal error: Class 'Doctrine\DBAL\Connection' not found in /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connections/MasterSlaveConnection.php on line 84

Call Stack:
    0.0008     289080   1. {main}() /var/www/html/dev/spa/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connections/MasterSlaveConnection.php:0