Q: Problem with Printing Photo Book thru Photo

I love a lot the function of Printing Photobook thru iPhoto and I have printed more than 5 Photo Book thru iPhoto before.

But since I upgrade my iMac to Yosemite with Photos 1.0.1,  I can still design and create my own Photo Book BUT I could not print my Photo Book anymore with the same address!!  Every time I press "Buy Book" it lead me the the page of checkout,  but the button "place order" is  dim and I could only choose "Cancel" or "Add Shipping Address".

When I tried to click " "Add Shipping Address" .  And whatever address I choose or even I try to add new address,  it prompt me with the dialogue box saying "Unable to Confirm Address" and when I press "continue" it lead me to another dialogue box saying "Invalid Address" - The information on the following field is missing or incomplete" Country Code is missing. 

And in Hong Kong, we do not have any postal code.   I don't know where I should put my country code in the address.