Fatal error: Uncaught Error: Class 'GuzzleHttp\Psr7\Request' not found in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\psr7\src\ServerRequest.php:25 Stack trace: #0 {main} thrown in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\psr7\src\ServerRequest.php on line 25