Fatal error: Uncaught Error: Class 'Omnipay\AuthorizeNet\Message\SIMAuthorizeRequest' not found in /home/app/htdocs/lidia/vendor/omnipay/authorizenet/src/Message/SIMPurchaseRequest.php:8 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/omnipay/authorizenet/src/Message/SIMPurchaseRequest.php on line 8