Set Safari Checkbox / Radio Button actions not seeing them on web page

Questions & Suggestions
1

There are four radio buttons and one check box on this web page, but the actions say "No checkboxes/radio buttons found."

In case it's relevant, I do have Safari set to "Allow JavaScript from Apple Events."

https://www.mhealthappointments.com/covidappt

Any idea what's wrong?

Thanks,
Russell