Can't buy faces with coupon code

[Gmn]

Hello,

I have a combination of Huawei P30 lite and Galaxy Watch 3. Till end of December, I was able to download and install paid faces with Coupon codes for free, through application in my mobile (Galaxy wearable). Everything was correct and I downloaded around 10 new faces. But now, let's say from beginning of the year, I add coupons, I can see them in voucher menu, I search the face, go to buy, add a coupon, click to buy and circle is loading and loading and after approx. 5 minutes it ends with error, that I can't buy it. 

May I ask you for a help, what should I do to download this stuff? 

Thank you.

[Gmn · Accepted solution]

Hello,

I found it and solved it. Probably, newly, It's necessary to add credit card even for free purchases. I don't know why, I don't know from when, because historically it was working without a card, but it's true. I hope it will be helpful for someone else with the same problem.