Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromisorInterface' not found in /home/wittyly/public_html/staging/wittymanager-api/vendor/aws/aws-sdk-php/src/Waiter.php:22 Stack trace: #0 {main} thrown in /home/wittyly/public_html/staging/wittymanager-api/vendor/aws/aws-sdk-php/src/Waiter.php on line 22