Fatal error: Uncaught Error: Class 'SwiftMailerTestCase' not found in /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/SwiftMailerSmokeTestCase.php:8 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/SwiftMailerSmokeTestCase.php on line 8