Error 406 - Recurring Sub Setup

I live in Australia and woke up today to an email saying that my subscription has been suspended. I tried to renew on the Mog Station only to get error 406. I haven't changed payment methods and the last 360 days have gone through successfully. I tried to use a different card and got the same error, 406. I have no idea what to do.

EDIT: Contacted my bank AND credit card company to verify there are no blocks on either card but I now have 4 charges for $1.46AU. Come on Square, I want to log in!