AbleCommerce Shopping Cart Software

I have been receiving this error as well recently and would love any guidance. Thanks!

After further research, it turns out the problem was that I was already logged in as an administrator. By default, if you are logged in you don't get "one page checkout" unless you use: NavigationHelper.GetCheckoutUrl(false) // Must pass false I changed the code in ConLib\Custom\Basket.ascx.cs:282 a...

Did you ever find an answer to your first question? I am wondering as well.

I'm a little confused about "one page checkout." Currently, when I click the checkout button from Basket.aspx, I am taken to Checkout/EditBillAddress.aspx, which only shows fields for entering the billing address. This leads me to believe that I am somehow not configured to use "one page checkout", ...