JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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I have inspected form that you last edited and it seems that you have deleted middle name field from your form.
Is that the form you are working on? If not can you please provide us ID of your form or URL of website where your form is embedded.
Inside of this guide you can find out how to add form to Google Sites:
Feel free to contact us if you have any other questions.