Merci theme won't let add products to cart
I have installed awesome looking Merci theme on the latest WP installation. However while testing the webshop I soon noticed that once a buyer selects a product and wants to add it to the cart, the loading item appears and the product never gets added to the cart. I then checked system status page in the admin and noticed that there are seven outdated files in the theme (I attached the screenshot). One of those is cart.php which I suspect causes the error. How can we solve this?
Looking forward to your reply.