Fatal error: Uncaught Error: Interface 'WPMailSMTP\Vendor\GuzzleHttp\Promise\PromisorInterface' not found in /home/marshalltowncsd/sites/marshalltown.k12.ia.us/releases/20230829083101/web/app/plugins/wp-mail-smtp/vendor_prefixed/guzzlehttp/guzzle/src/Pool.php:23 Stack trace: #0 {main} thrown in /home/marshalltowncsd/sites/marshalltown.k12.ia.us/releases/20230829083101/web/app/plugins/wp-mail-smtp/vendor_prefixed/guzzlehttp/guzzle/src/Pool.php on line 23