What version of Data Bridge are you using?
Make sure you have version 1.1.3 installed, if you have a previous version, uninstall it from the extension manager and install the newer version.
once you install the 1.1.3 version, delete the following files from your site:
the go to the server behaviors panel, double click the universal email server behavior and set the Go To page to redirect to another page after sending the email.
make sure to upload the newer versions of the files that where deleted. if you continue to have a problem, please send a copy of the webassist/email/waue_Sell2_2.php file