JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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 a test submission on this form (https://www.jotformpro.com/form/43116324005945). I was able to submit it and it even redirected me to the Thank You page.
Is this the form you're having issues with? If not, please provide the form URL so that we can check. If the form is embedded on a webpage, please share the URL of the webpage as well so that we can further investigate.