JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
We're sorry for the inconvenience you had because of this error.
Our developers did certain changes on how our upload fields are working so that could cause the error message you saw. I did some adjustments on your account and you shouldn't have any problems.
If you face some similar error please let us know so we can take a look.