I dont know if this the correct spot to share this, your bug report page is not clear. I am trying to buy the pre-release bundle for Last Airbender, the one with 50 packs etc and I am unable to do it.
I click the price
I enter my card details
I get an error page that you couldnt follow the link, return to arena.
I restart the app, try again I get the same. I restart pc try again I get the same.
I used a different card I get a spinning circle, probably trying to access my card provider and then I get white screen.

I attach detailed logs, and the two error images. Also I have already contacted customer support and they redirected me here.