Error message: There are no choice-based fields in this form to configure a Choice-based Field Rule

Error message: There are no choice-based fields in this form to configure a Choice-based Field Rule

I am trying to configure some Choice Based lists in order to create some rules for the form I have created.

In attempting to set up a Choice based field rule, I am trying to follow the instructions on this page here (but failing mightily at the first hurdle) - https://help.zoho.com/portal/en/kb/forms/conditional-rules/choice-based-field-rules/articles/dependency-rules#Configuring_Choice-based_Field_Rules

On Bullet point 2 it says click 'Configure here' but I am only getting the error message as above (in the title, see attached image also).

Can anybody help please?

Thanks in advance.

Derrick