After selecting size and color of the shoe I cant click on contiune to checkout or something, as you can see its missing below, cant be read or clicked.
After clicking the “Select options” button, please make sure to choose the size and color attributes for the product. Once the options are selected, scroll down a little — you will then see the “Add to cart” button appear.
After adding the product to the cart, you’ll be able to proceed to the cart and then the checkout pages normally.