Is the promotional code being displayed but a user is not able to check out with it?
Please confirm that the codes within your own cart admin are active. The actual code need to exist/be generated within your cart admin, Justuno simply presents them to your user. Please contact your platforms help center if you're not sure where this is entered!
WARNING: Do not alter the Coupon Presenter Layer dynamic placeholder text:
You may highlight the text and alter the formatting, but changing the character string will disable the coupon code layer and prevent your promotion from being published. To fix this issue, add a Unique Coupon Box layer from the "Add Layer" context menu within the design canvas and ensure you only alter the formatting.