Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Connection refused in /app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:40 Stack trace: #0 /app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(40): PDO->__construct('mysql:host=172....', 'yugopolis', 'yugopolis', Array) #1 /app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php(40): Doctrine\DBAL\Driver\PDOConnection->__construct('mysql:host=172....', 'yugopolis', 'yugopolis', Array) #2 /app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(356): Doctrine\DBAL\Driver\PDOMySql\Driver->connect(Array, 'yugopolis', 'yugopolis', Array) #3 /app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(680): Doctrine\DBAL\Connection->connect() #4 /app/vendor/doctrine/orm/lib/Doctrine/ORM/Query/Exec/SingleSelectExecutor.php(50): Doctrine\DBAL\Connection->executeQuery('SELECT c0_.id A...', Array, Array, NULL) #5 /app/vendor/doctrine/orm/lib/Doctrine/ORM/Query.php(286): Doctrine\ORM\Query\Exec\SingleSelectExecutor->execute( in /app/src/FrontendBundle/Resources/views/base.html.twig on line 42