Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1049] Unknown database 'app' in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:46 Stack trace: #0 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(46): PDO->__construct('mysql:host=mysq...', 'root', 'root', Array) #1 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php(44): Doctrine\DBAL\Driver\PDOConnection->__construct('mysql:host=mysq...', 'root', 'root', Array) #2 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(389): Doctrine\DBAL\Driver\PDOMySql\Driver->connect(Array, 'root', 'root', Array) #3 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(921): Doctrine\DBAL\Connection->connect() #4 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(987): Doctrine\DBAL\Connection->executeQuery('SELECT e0_.id A...', Array, Array) #5 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(918): Doctrine\DBAL\Connection->executeC in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php on line 113