title: magento configurable product have no “Add to cart” button
body: <p>I have created a configurable product and also added two products in it with proper size and color option but in the frontend in product details page, there is no add to cart button or select size/color option.I also added quantity and selected in stock option for both of the products.Here is my screenshot.</p>
  
  <p><img src="https://i.stack.imgur.com/6wQoN.png" alt="enter image description here"></p>
  
  <p>Please help.</p>