Woocommerce_checkout not showing anything

Hi

I created a new page with a new design in order to boost my checkout page.

The woocommerce_checkout tag doesn’t show any content on this page, and if try to set it up “officially” in the settings as the checkout page, it redirects automatically to the cart page with a 302.

I tried all the usual stuff, removing all plugins except woocommerce, with no avail.

The original checkout page is still working, but any tentative to create a new one fails.