My friend is applying in Hanoi. The system has said 'payment failed' 3 times, using 3 different cards. He has changed browser from Chrome to Firefox, same thing. Now it just signs them out and returns to sign-in screen when they try to pay. The info is all correct. They think it might have something to do with addresses, but it's not clear how that would work, and the payment screen doesn't have any fields for address info anyway. There is nothing even showing up in bank app as pending or declined. Any advice would be appreciated 🙏