Fatal error: Uncaught Error: Class "PhpSpec\ObjectBehavior" not found in /home/flighto/e-commerce/vendor/sylius/mailer-bundle/src/Bundle/spec/Sender/Adapter/DefaultAdapterSpec.php:22 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius/mailer-bundle/src/Bundle/spec/Sender/Adapter/DefaultAdapterSpec.php on line 22