Fatal error: Uncaught Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException: You have requested a non-existent parameter "mailer_dsn". Did you mean one of these: "mailer_host", "mailer_user"? in /home/autodeal/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php:95 Stack trace: #0 /home/autodeal/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php(69): Symfony\Component\DependencyInjection\ParameterBag\ParameterBag->get('mailer_dsn') #1 /home/autodeal/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php(206): Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag->get('mailer_dsn') #2 /home/autodeal/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php(177): Symfony\Component\DependencyInjection\ParameterBag\ParameterBag->resolveString('%mailer_dsn%', Array) #3 /home/autodeal/vendor/symfony/symfony/sr in /home/autodeal/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php on line 95