[Woo POS]: Display "Coupon doesn’t apply to any products" error – Dummy UI

[malinajirka]

This might be handled as part of https://github.com/woocommerce/woocommerce-android/issues/13736 which should be implemented first. We'll need to think of a solution depending on the behavior of the API.

[dangermattic]

Thanks for reporting! 👍