Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /mnt/HC_Volume_103237921/domhoste/pay.shunlocker.com/vendor/symfony/mailer/Tests/Command/MailerTestCommandTest.php:20 Stack trace: #0 {main} thrown in /mnt/HC_Volume_103237921/domhoste/pay.shunlocker.com/vendor/symfony/mailer/Tests/Command/MailerTestCommandTest.php on line 20