Fatal error: Uncaught Error: Class "Doctrine\DBAL\Migrations\AbstractMigration" not found in /var/www/apache/dev/cal/web/src/DB/Migrations/Version20160407194955.php:12 Stack trace: #0 {main} thrown in /var/www/apache/dev/cal/web/src/DB/Migrations/Version20160407194955.php on line 12