I'm testing the "forward to a friend form" and surprisingly it seems that doesn't work.
The message that appears is:
Sorry, but there's a been a problem
An error has occured
Click here to go back to the form and try again.
That's a tough one. Is this from a preview or a full campaign? The forward form does only work completely in live campaigns, not previews.
Would you get in touch with support with the details of the campaign? We can take a look and see what might be going on.
It is solved! Thanks Diana.
It seems that it doesn't work in "test" option, but fortunately it works right when you send the email.