Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\plugins\Symfony\Component\Webhook\Test\AbstractRequestParserTestCase.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Webhook\Test\AbstractRequestParserTestCase.php on line 22