What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I did send 3 test submissions to your form and all ended in a properly working 'Thank You' page:
Could you please check again. If the issue persist on your side please send us your screenshots in order for us to investigate the issue further. Please use our forum to send the screenshots.