Fatal error: Uncaught Error: Interface "WPMailSMTP\Vendor\GuzzleHttp\Promise\PromisorInterface" not found in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/wp-mail-smtp/vendor_prefixed/guzzlehttp/guzzle/src/Pool.php:23 Stack trace: #0 {main} thrown in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/wp-mail-smtp/vendor_prefixed/guzzlehttp/guzzle/src/Pool.php on line 23