VM 4.0.12 page error

[Teejay]

Dear Support,
please help with right set up for VM frontend home page, cos something is not functioning properly, with our website, the default Nederlands content pages is not capturing payments, while the Flemish pages does, when you add product to cart, on the dutch content page, for one reason on another, you click save to fill in factor & delivery details, you get error prompt 404, now have edited the home page with same setting as the Flemish one, click no button (COM_VIRTUEMART_CLEAR_CART_DESC), refreshed browser, still no juice, check the link: https://altenagala.nl/gebruiker/wijzig_factuuradres, their is actual link to user page, yet its not working, thought maybe someone else knows solution here