Fatal error: Uncaught Error: Interface 'WPMailSMTP\Vendor\GuzzleHttp\Promise\PromisorInterface' not found in /home/clmepl5/public_html/web/app/plugins/wp-mail-smtp/vendor_prefixed/guzzlehttp/guzzle/src/Pool.php:23
Stack trace:
#0 {main}
thrown in /home/clmepl5/public_html/web/app/plugins/wp-mail-smtp/vendor_prefixed/guzzlehttp/guzzle/src/Pool.php on line 23