Fatal error: Uncaught Error: Class "PhpSpec\ObjectBehavior" not found in /home/flighto/e-commerce/vendor/sylius/theme-bundle/spec/Factory/ThemeFactorySpec.php:20 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius/theme-bundle/spec/Factory/ThemeFactorySpec.php on line 20