404

I'd like to register my A/P that i bought off of the Microsoft store to my Affinity account. I was thrilled why it first came up that it's now possible to do so. I've tried to do so for pretty long now but every time i click Register Now it tells me that something went wrong and to try again. How can I fix this? Thanks a lot -404 Edit: Oh yea the code : 0x00000001 server response issue