Navigate to the WordPress dashboard and click on the "Pages" or "Posts" section. Click on the page or post where you want to display the add to cart button. In the editor, switch to the "Text" tab. Enter the shortcode for the add to cart button - [add_to_cart id=PRODUCT_ID] .

So, what causes WooCommerce to quit adding products to the cart? WooCommerce typically stops working due to a setting within the plugin, the WordPress installation, or the website's cache. The problem can also result from a conflict with the theme your site is using, or another plugin.

If the WooCommerce View Cart not working issue arises, it might be because your permalinks are incorrectly set. To reset them, go to Settings » Permalinks from your WordPress dashboard. In the 'Permalinks settings' tab, scroll down and click on the 'Plain' option.