Hi,
The cause is: The default our config on CMS Home Page for option product_order_by is best_sales. While your site don’t have any best_sales product. I’ve go to Admin >> CMS >> Pages >> Your Homepage >> Tab: Design >> Field: Update Layout XML find and change:
<product_order_by>best_sales</product_order_by>
To:
<product_order_by>created_at</product_order_by>
