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.
No, I haven seen any similar reported issue. Is this the form you are referring to? If yes, I guess you are referring to the upload field. What is the size of the file you are trying to upload?
It might be related to the size, or the internet connection. If you need to increase the upload size limit, here is how: https://www.jotform.com/help/33-Changing-the-upload-size-limit
NOTE: you might need to have a paid account to get this working, free accounts only allow a total amount space of 100 MB.
Let us know if you need more help.