Fatal error: Uncaught Error: Interface 'WPMailSMTP\Vendor\GuzzleHttp\Promise\PromisorInterface' not found in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Waiter.php:21 Stack trace: #0 {main} thrown in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Waiter.php on line 21