Fatal error: Uncaught Error: Class "Amazon\Payment\Gateway\Http\Client\AbstractClient" not found in /home/airtimer/public_html/vendor/amzn/amazon-pay-module/Gateway/Http/Client/AuthorizeClient.php:30 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/amzn/amazon-pay-module/Gateway/Http/Client/AuthorizeClient.php on line 30