Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\vendor\symfony\http-kernel\Tests\Event\GetResponseForExceptionEventTest.php:19 Stack trace: #0 {main} thrown in E:\xampp\htdocs\vendor\symfony\http-kernel\Tests\Event\GetResponseForExceptionEventTest.php on line 19