Fatal error: Uncaught Error: Call to a member function loadFromExtension() on null in /home/itscm/dev.its.cm/webserivesits/vendor/symfony/swiftmailer-bundle/Tests/DependencyInjection/Fixtures/config/php/null_mailer.php:3 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/webserivesits/vendor/symfony/swiftmailer-bundle/Tests/DependencyInjection/Fixtures/config/php/null_mailer.php on line 3