Fortnite payment not possible?

I also wanted to charge myself V-Bucks:

Now it says: Unfortunately, an error occurred while processing your payment. Please return to the shop system.

What should I do?

It is best to restart the game, device and possibly router and try again.

It can also be a problem with the ordering system, in which case all you have to do is wait a little and try again at another time.

Nice day!

Which cookies have to be activated?

I do not know exactly. The whole ordering system is also in-game, so it's best to wait until it works again.