Fatal error: Uncaught Error: Class "Http\Psr7Test\UploadedFileIntegrationTest" not found in C:\xampp\htdocs\vendor\slim\psr7\tests\Integration\UploadedFileTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\slim\psr7\tests\Integration\UploadedFileTest.php on line 20