This error is generally generated if the email section of your Web Reports is not setup appropriately. Can you clear the error, and then confirm that you can send a test email from Web Reports and receive it at the destination address? If you get the error and do not get the email at the destination address it sounds like your email settings need to be reconfigured in Web Reports to match up appropriately with your mail server. If this does not solve the error please open a support ticket with us on this matter.