Smarty email template error issue

[sf23103]

I recently had a form that would not allow me to send an email, I would get the error "Couldn't load page: https://www.domain.com/formtools_dir/global/code.actions.php?action=edit_submission_send_email&submission_id=12345&email_id=29&form_id=33"

I finally tracked it down to an error in the email template where I didn't close one of the smarty fields with a "}". It would be nice if there could be an error alert on that page, or maybe the "couldn't load page" error would be more descriptive.

I'm using 3.0.20 with swift mailer 2.0.7. Hope this helps.