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 have checked the form in your account and found that you were able to successfully integrate your form with PayPal, upon submitting it I was able to see it redirects to the payment page properly.
I would suggest you to check these guides about PayPal:
If you're still unable to see the payment area in your form, please try from a different web browser.