Fatal error: Uncaught Error: Class "WPMailSMTP\Vendor\Aws\ClientSideMonitoring\AbstractMonitoringMiddleware" not found in /var/www/html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/ClientSideMonitoring/ApiCallAttemptMonitoringMiddleware.php:15 Stack trace: #0 {main} thrown in /var/www/html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/ClientSideMonitoring/ApiCallAttemptMonitoringMiddleware.php on line 15