Fatal error: Uncaught Error: Class "Nette\Mail\MimePart" not found in /home/devmindz/public_html/fedex_api/php/vendor/nette/mail/src/Mail/Message.php:20 Stack trace: #0 {main} thrown in /home/devmindz/public_html/fedex_api/php/vendor/nette/mail/src/Mail/Message.php on line 20