Fatal error: Uncaught Error: Class "Mailgun\Api\HttpApi" not found in /home/backend/public_html/shoot/api/system/vendor/mailgun/mailgun-php/src/Api/DomainV4.php:38 Stack trace: #0 {main} thrown in /home/backend/public_html/shoot/api/system/vendor/mailgun/mailgun-php/src/Api/DomainV4.php on line 38