Fatal error: Uncaught Error: Class 'WPMailSMTP\Vendor\Aws\Signature\SignatureV4' not found in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Signature/S3SignatureV4.php:10 Stack trace: #0 {main} thrown in /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Signature/S3SignatureV4.php on line 10