Fatal error: Uncaught Error: Class "GuzzleHttp\Psr7\Request" not found in /var/www/html/GameAPI/Mailer/mailjet-apiv3-php-no-composer/vendor/guzzlehttp/psr7/src/ServerRequest.php:25 Stack trace: #0 {main} thrown in /var/www/html/GameAPI/Mailer/mailjet-apiv3-php-no-composer/vendor/guzzlehttp/psr7/src/ServerRequest.php on line 25