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