Fatal error: Uncaught Error: Class 'SwiftMailerSmokeTestCase' not found in /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/smoke/Swift/Smoke/HtmlWithAttachmentSmokeTest.php:6 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/smoke/Swift/Smoke/HtmlWithAttachmentSmokeTest.php on line 6