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 tested your form. After the submission, this warning message appeared.
The reason you are having this issue is that you have arrange to disable your form on a specific date as you can see in the picture below. To fix it, kindly click on Preferences and change the status to "Enable".
This should solve your problem. If the issue still continues, please contact us.