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 did check your last edited form and I am able to replicate the issue you are having. PayPal checkout page displays error message after the form is submitted.
Upon checking your form, I found that you have not configured your PayPal payment question correctly. Please check the screenshot below:
In the "PayPal Account" text box, you have to actually input your PayPal account email address. Please input the email address which you use to sign in to your PayPal account and that should solve your problem.
Do get back to us if you have any questions.