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.
So far I have not seen such error being reported, but if you happen to experience the same without changing the font, please do let us know and we would be happy to investigate why that might have happened.
Unfortunately there is not a lot that we can do without the form as it is after the issue happened.