Fatal error: Uncaught Error: Interface 'WPMailSMTP\Vendor\GuzzleHttp\Promise\PromisorInterface' not found in E:\www\web\wp-content\plugins\wp-mail-smtp\vendor_prefixed\guzzlehttp\guzzle\src\Pool.php:20 Stack trace: #0 {main} thrown in E:\www\web\wp-content\plugins\wp-mail-smtp\vendor_prefixed\guzzlehttp\guzzle\src\Pool.php on line 20