If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
Please check your e-mail account for my test messages, also Junkmail and Spam folders. If you didn't get them, please let me know.
A possible reason why people get that error message is that they forget to fill in the Captcha box at the bottom of the form. I get the error message you reported when I don't fill in the Captcha box:
You can disable the Captcha box under your form settings (click on "Edit" on the Form Widget in your Sitebuilder" and delete the Captcha Box by clicking on the red X). Then you could try again and see if this works. The Captcha box is supposed to protect you from spam and automatic programmes that abuse you form to send you spam or other undesired e-mails.
Please keep us updated if the issue should persist.