Fatal error: Uncaught Error: Class 'GuzzleHttp\Exception\RequestException' not found in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\guzzle\src\Exception\BadResponseException.php:10 Stack trace: #0 {main} thrown in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\guzzle\src\Exception\BadResponseException.php on line 10