Unable to see message in Enable/Required field condition

https://www.jotform.com/answers/1838954-make-sure-the-end-date-isnt-before-the-start-date

In the past screenshot, "5. Create another condition this time on Enable/Require Field that Disables the Submit button with the same IF statement."

I am not able to see the option to disable submit with a message.

On the ticket that you have referred to, the example was shown for a Card form, where enable/disable conditions can be used to disable Submit button.

The form in your account https://www.jotform.com/211685194328057 is a Classic form where this condition cannot be used. You can use Show/Hide conditions to Hide the submit button -https://www.jotform.com/help/316-how-to-show-or-hide-fields-base-on-users-answer.

Please check that and let us know.