Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\print\vendor\symfony\contracts\Tests\Service\ServiceSubscriberTraitTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print\vendor\symfony\contracts\Tests\Service\ServiceSubscriberTraitTest.php on line 20