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 think your problem is related to encryption, if you can provide us with some details about the specific issue with private key, we should be able to help you.
Note that, if you lost your private key, we cannot recover it as it is not saved in JotForm server.
The best thing to do if you lost the private key, is disable encryption for every form and do not try to create a new key since it will not be able decrypt the previously encrypted submissions.