None of Google's shared plans work cross-country - YouTube, Google Play, Stadia, Google One. All of them error, sometimes cryptically ( e.g. "Can't access payment methods"). It should be clearer what the issue is, with clear, concise error messages, but IMHO it's not a bug per se. Different country legislations, copyright, tax codes, prices, etc. etc. make that a complex matter and i see how they wouldn't want to deal with it.