The purchase code works until the client click on “payer avec Paypal” or “commander”, on the final page (with all the delivery informations and the payment infos). Then, when they click, the discount disappear.
I saw this issue.
In our demo, it still works well,
You can check in our demo http://demo.roadthemes.com/domino with coupon code: “111111”
Can you give me wp admin details in private reply that I can check your config?