Fatal error: Uncaught Error: Interface "Magento\Payment\Gateway\CommandInterface" not found in /home/airtimer/public_html/vendor/amzn/amazon-pay-module/Gateway/Command/AmazonAuthCommand.php:38 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/amzn/amazon-pay-module/Gateway/Command/AmazonAuthCommand.php on line 38