Fatal error: Uncaught Error: Class "Http\Client\Tests\HttpClientTest" not found in C:\Users\Administrator\Desktop\xamp\htdocs\sdk\guzzlehttp\guzzle\tests\HttplugIntegrationTest.php:12 Stack trace: #0 {main} thrown in C:\Users\Administrator\Desktop\xamp\htdocs\sdk\guzzlehttp\guzzle\tests\HttplugIntegrationTest.php on line 12