Woocommerce – Checkout reload/refresh

Hi,

I updated woocommerce to 2.3.11 and have now the problem, that when I click on the PROCEED TO CHECKOUT Button at the cart page, the page just reload and don’t go to the checkout page I assigned at WC->Settings->Checkout->Checkout page. Under WC->Settings->System Status everything seems to be ok…

Have anyone an idea?

Thanks in advance
Andy