Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/technog6/public_html/uniserv/vendor/symfony/mailer/Tests/Transport/FailoverTransportTest.php:24 Stack trace: #0 {main} thrown in /home/technog6/public_html/uniserv/vendor/symfony/mailer/Tests/Transport/FailoverTransportTest.php on line 24