Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/trairtil/public_html/vendor/symfony/error-handler/Tests/Exception/FlattenExceptionTest.php:33 Stack trace: #0 {main} thrown in /home/trairtil/public_html/vendor/symfony/error-handler/Tests/Exception/FlattenExceptionTest.php on line 33