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.
Please provide us ID of the form that is causing mentioned issue. If the form is embedded, please provide us URL of your website, so that we can test your form there.
Also are you getting a 504 error message, when you upload a file to your form or when you try to submit your form? Which file type are you trying to upload?
Looking forward to your reply.