Fatal error: Uncaught Error: Class 'Mailgun\Model\Domain\AbstractDomainResponse' not found in C:\Apache24\htdocs\afnic\vendor\mailgun\src\Model\Domain\VerifyResponse.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\afnic\vendor\mailgun\src\Model\Domain\VerifyResponse.php on line 17