Hello, I too had problems with Error 401 today while subbing. It appears my card received 30day ban from 3+ renewal attempts according to RUMOURS.
I don't even have these fancy gamecard in my country so I was kinda meh for moment. Luckily crysta points worked. If you too experience this error 401 when subbing try buy those crysta points via Paypal which is under UltimatePay tab.
Cya around and have a nice day folks
(Still want my name change rawr >.<)