Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Connection' not found in /mnt/volume_lon1_01/backend/admin/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/PoolingShardConnection.php:51 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/PoolingShardConnection.php on line 51