The coupon field isn't working

The Gravity Forms Coupons Add-On currently requires a working product field to be present on the form - ensure it's editable.

If you have Gravity Flow 1.4.2+ and Gravity Forms Coupons Add-On 2.3.2+ the editable product field is no longer a requirement. The coupons field will now function even when it's the only editable field on the step, as long the display fields setting is set to all fields or there is at least one product or total field selected.