I keep getting blank subscription forms from my website. Why?

It's just two lines -- name and email address. It was working fine in August but nothing but blanks in September. How do I tell if it's JotForms or WordPress that's dysfunctional? And how do I fix it?

I checked your website and form, your form doesn't have required fields:

Meaning it can be submitted even though there is no values inputted. I did a test submission and it is showing as you can see below:

If you want to be sure that you always receive data make those fields required:

Hope it helps.

Thank you!