Fatal error: Uncaught Error: Interface "Magento\Framework\Event\ObserverInterface" not found in /home/airtimer/public_html/vendor/amzn/login-with-amazon-module/Observer/AmazonCustomerAuthenticated.php:30 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/amzn/login-with-amazon-module/Observer/AmazonCustomerAuthenticated.php on line 30