I am creating a website for a customer. Have setup the ecommerce module, trunk and the PayPal system. But when I went to a product to test the ecommerce system I clicked "Add this item to cart" and I was sent to a page at http://mysite.com/product-page/add and got an error code saying "Fatal error: Cannot instantiate abstract class ShippingCalculator in /home/content/s/e/a/seattlehalal/html/sapphire/core/Object.php on line 99"
Can understand that something is wrong with the shipping calculator but after reviewing countless forum pages for countless hours I can not understand what went wrong. Would appreciate help a.s.a.p. since client is waiting on me to fix it.