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.
Thank you for contacting us.
You can try to clear your browser cache and cookies, and then share the form once again. Also, you can try to add the form to your Facebook page using any other browser.
I was not able to reproduce the issue with a cloned version of your form. The Facebook App worked great on my side.
If the JotForm Facebook Tab is not going to work, there is an alternative sharing method:
Please feel free to contact us if you need any further assistance on this.