Fatal error: Uncaught Error: Interface 'WPMailSMTP\Pro\Alerts\Handlers\HandlerInterface' not found in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/src/Pro/Alerts/Providers/SlackWebhook/Handler.php:17 Stack trace: #0 {main} thrown in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/src/Pro/Alerts/Providers/SlackWebhook/Handler.php on line 17