How to make form mobile responsive?

I have the same problem. Putting the widget Mobile Responsive does not work. Is there another option to resolve the problem?Thank

What is the form you are working on? Have you embedded it in a webpage? If yes, please share the URL of the page where the form is embedded. 

Meanwhile, make sure to have enabled the mobile responsive option in the Designer feature:

https://www.jotform.com/help/311-How-to-make-forms-mobile-responsive