Why is it saying "Form over quota"?

I have checked your account and you have reached your limit of payment.

In your free plan, you are allowed to have 1 payment based submission which you have alread used.

You can check our pricing page: https://www.jotform.com/pricing

You can upgrade your account to get more payment limit or you can wait until your payment quota refilled.

If you have any further query, please let us know.