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 checked your form (https://form.jotform.com/60615543471958) but I was not able to replicate the issue you are reporting. The PDF documents are displayed properly.
Can you try again and see if you will still encounter the issue? If the issue still persists, please try to re-integrate the PDF Embedder widget (remove current widget and add again) and see if this will help fix the issue.