Unable to access for one week, but I figured a TEMPORARY WORKAROUND
Site:
Walmart Customer DIS-Service is NO HELP AT ALL. But, I figured out a workaround. Sign out of your account. Clear your cache & cookies. Put the item(s) you want in your cart. When going to check out, sign into your account. You should be able to purchase/complete the checkout for whatever you just placed in the cart. However, clicking on your cart after signing in will likely not help-I've been getting an error message ("Due to technical difficulties, we can't show the page you're trying to get to. What would you like to do?") the whole week when I do that. You should be able to "hover" your cursor over the cart symbol to show you what's in the cart, though. Hope this helps, because I know Walmart.com won't.