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.
Looks like you have already resolved this by upgrading your account to Gold Plan. But just in case, I think this is what happened;
You have an Economy Yearly subscription with Jotform which is supposed to renew on September 5, 2015, but our payment processor (FastSpring) failed to charge your card on file. FastSpring gave you a few weeks to update your payment method and looks like you fail to update it so our system automatically cancel your subscription and set back your account to the Free Plan.
Your current count that time is above the free account limit which is 100 submissions per month only. That's why when you submit the form, it says the over quota error.