Fatal error: Uncaught Error: Class 'Acelle\Model\SendingServerMailgun' not found in /home/appilogicx/public_html/marketing/app/Model/SendingServerMailgunSmtp.php:27 Stack trace: #0 {main} thrown in /home/appilogicx/public_html/marketing/app/Model/SendingServerMailgunSmtp.php on line 27