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.
The "Create PDF" tool is still being improved, sometimes if the form is too long it might take time before it is fully converted. I cloned your form and tried to convert it and was able to do so.
If you can't convert the current form you have, you could try cloning it and see if the cloned form converts successfully to a fillable PDF.
Here's a guide on how to clone your form: https://www.jotform.com/help/27-How-to-clone-an-existing-form-from-your-account
I also strongly advise checking this link to learn more about our fillable PDF forms: https://www.jotform.com/help/312-Fillable-PDF-Everything-you-need-to-know-about-JotForm-Fillable-PDF-Creator
Let us know if the cloned form works. Apologies for the inconvenience.