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 would like to apologize for any inconvenience this have caused you. There are no known issue when adding a facebook tab. Is there any error message you are receiving when you try to add a Form to your facebook page? You may, by the way, use this guide: Adding-Form-to-Facebook-Pages and/or this one Adding-Form-to-Facebook-Custom-iFrame-App- to add forms to your facebook page. For this to work, make sure you have at least one Facebook page.
You may also try to clear your browser's cache and see if it solves the issue.
Let us know if you still have the same issue after following the issue on the guides provided. Thank you.