coupon field is not displaying

Hi i have membership pro 2.21.1 installed.

I have enabled coupon field at the backend, but the field is not getting displayed on the subscription page.

Any clues, thanks.

Hello

Maybe it is because there is no valid coupon code for the plan yet. Please submit a support ticket sending me:
- Super admin account
- Link to that subscription form

I will check to see why it is not being displayed and guide you to correct it

Tuan