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 checked your form and indeed, there is only the revision history for today:
I checked the revision history for several of my own forms and it appears to be working properly.
Check through the revisions that are showing to make sure one of those is not the one you are looking for. If it is not, we can help you get the widget added back the way you had it if you would like.