The field pre-populator doesn't continue after I have chosen a form and

I was unable to replicate the issue you have encountered as shown below.

Please try using another browser or incognito mode. If the issue still persist, please provide us a screenshot of your browser console log after you click on Continue button. Please refer to the guide on how to get your browser console log.

Guide: How to Get a Console Report from Most Common Browsers?

We also have a Prefill feature for forms. Incase you are interested in it please refer to the guide provided.

Guide: What Is Jotform Prefill and How Does It Work?

Looking forward to your reply.