Fatal error: Uncaught ReflectionException: Class PHPUnit\Framework\TestCase does not exist in /home/devmecseminars/public_html/mec/vendor/symfony/validator/Test/ForwardCompatTestTrait.php:18 Stack trace: #0 /home/devmecseminars/public_html/mec/vendor/symfony/validator/Test/ForwardCompatTestTrait.php(18): ReflectionMethod->__construct('PHPUnit\\Framewo...', 'tearDown') #1 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/validator/Test/ForwardCompatTestTrait.php on line 18