Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/dbdevweblamp/public_html/vendor/symfony/contracts/Tests/Service/ServiceSubscriberTraitTest.php:21 Stack trace: #0 {main} thrown in /home/dbdevweblamp/public_html/vendor/symfony/contracts/Tests/Service/ServiceSubscriberTraitTest.php on line 21