WP_Error Object
(
    [errors] => Array
        (
            [wp_mail_failed] => Array
                (
                    [0] => You must provide at least one recipient email address.
                )

        )

    [error_data] => Array
        (
            [wp_mail_failed] => Array
                (
                    [to] => Array
                        (
                            [0] => 
                        )

                    [subject] => Receipt for payment
                    [message] => 
                    [headers] => Array
                        (
                        )

                    [attachments] => Array
                        (
                        )

                    [phpmailer_exception_code] => 2
                )

        )

    [additional_data:protected] => Array
        (
        )

)