Checkout page not accessible from Basket page

Hello,

I have a small problem with EShop. I am setting up this webshop and everthing works fine; when I click on "checkout" from the Basket overview (attach 1), I reach the checkout page without problems.
But when I open the basket then click on checkout at the bottom of the page, I get the following error :
''Sorry, the page you are looking for is not found." (attach 2 & 3)
Do you any idea why?
I have followed your instructions to create a menu item for the checkout page so I don't understand why it fails.
Thanks