Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Application\www\E-Tracking\vendor\symfony\debug\Tests\Exception\FlattenExceptionTest.php:33 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\symfony\debug\Tests\Exception\FlattenExceptionTest.php on line 33