Fatal error: Uncaught Error: Interface "GuzzleHttp\MessageFormatterInterface" not found in C:\Users\Administrator\Desktop\xamp\htdocs\sdk\guzzlehttp\guzzle\src\MessageFormatter.php:38 Stack trace: #0 {main} thrown in C:\Users\Administrator\Desktop\xamp\htdocs\sdk\guzzlehttp\guzzle\src\MessageFormatter.php on line 38