No idea where i should say that but I’ll just post here.
(Im from Brazil if needed)
It’s been hours that I’ve been trying to add a credit card but there’s this error, thought i could just wait some minutes or something but it’s been like that for hours now.
I had a similar issue from a US based residential IP address (although I got a different error at the time that required looking for javascript errors in the console). Sometimes your ISP just gives you an address that a previous user used for spam.
We’re all just grasping in the dark here, hopefully one of those solutions works.