How to Fix the “Cart is Empty” Issue when using WP Rocket?

When installing WP Rocket, some users have got problems with Woocommerce Booking emptying on their shopping cart. Becuase WP Rocket cached the mini cart,

Go to Settings > WP Rocket > Advanced Rules

Adding “woocommerce_items_in_cart” to the Never Cache Cookies field and /cart/ and /checkout/ to the Never Cache URL(s) section