Customer says she wasn't able to checkout because it wouldn't let her choose ship to country


A customer just sent me this message:

"I am trying to click on the United States shipping and it wont let me. I can choose multiples, but not country for shipping. Please check it out- I really want to order with you."

Is this an error anyone else has heard of? She can’t complete her order because she can’t select a ship to country. Please help.