Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\reservation\vendor\symfony\psr-http-message-bridge\Tests\Functional\CovertTest.php:35 Stack trace: #0 {main} thrown in C:\xampp\htdocs\reservation\vendor\symfony\psr-http-message-bridge\Tests\Functional\CovertTest.php on line 35