I am using e-commerce with the Customizr theme (3.1.5). I have created my store, and can see that page (/products-page/). I can select items and they appear in a widget sidebar cart. I have a check-out page that has the shortcode [shoppingcart] that is published publicly - and is a sub-page to the store page (/products-page/checkout/) . You have to be a member to buy. I am logged in.
I get "This webpage is unavailable" when I try to go to checkout.
I have updated all of my plug-ins, theme, WP etc.
Please help. This should be very basic (I would think) but I have just been spinning my wheels on this one for a couple of hours!