Fatal error: Uncaught Error: Class "Interop\Http\Factory\UploadedFileFactoryTestCase" not found in C:\xampp\htdocs\vendor\slim\psr7\tests\Factory\UploadedFileFactoryTest.php:26 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\slim\psr7\tests\Factory\UploadedFileFactoryTest.php on line 26