Fatal error: Uncaught Error: Class "GuzzleHttp\Exception\RequestException" not found in I:\www\oauth2\resource_server\vendor\guzzlehttp\guzzle\src\Exception\BadResponseException.php:11 Stack trace: #0 {main} thrown in I:\www\oauth2\resource_server\vendor\guzzlehttp\guzzle\src\Exception\BadResponseException.php on line 11