I booked BNE DOH MUC J yesterday using VA points. Kept on getting an error message upon the payment of taxes screen. Finally after a few attempts I logged out of Velocity on all devices, and restarted from scratch. All went through. As an aside note, I’ve also booked separately FCO SIN DPS J on the VA site, and no problems there. No substance at all in saying your cant book ex EU to AU or elswhere.