Fatal error: Uncaught Error: Class 'Swift_Mime_SimpleMimeEntity' not found in /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/fixtures/MimeEntityFixture.php:3 Stack trace: #0 /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/unit/Swift/Mime/AbstractMimeEntityTest.php(3): require_once() #1 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/swiftmailer/swiftmailer/tests/fixtures/MimeEntityFixture.php on line 3