Fatal error: Uncaught Error: Class "Symfony\Bundle\SwiftmailerBundle\Tests\TestCase" not found in C:\xampp\htdocs\electronica\vendor\symfony\swiftmailer-bundle\Tests\DependencyInjection\SwiftmailerExtensionTest.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\symfony\swiftmailer-bundle\Tests\DependencyInjection\SwiftmailerExtensionTest.php on line 22