What version of data Bridge do you have?
I think this is an issue that was fixed in version 1.1.3.
If you have a previous version installed, make sure to uninstall it from the extension manager before installing the newer one.
after installing the newer version, make sure to delete the webassist/security_assist/helper_php.php file from your site, then edit the Email password behavior and click OK to have it regenerated. make sure to upload the new webassist/security_assist/helper_php.php file to the server