Bug:
System.Web.HttpException (0x80004005): Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'. ---> Nop.Core.NopException: Shipping rate computation method could not be loaded at Nop.Services.Orders.OrderTotalCalculationService.GetShoppingCartShippingTotal(IList`1 cart, Boolean includingTax, Decimal& taxRate, List`1& appliedDiscounts) in E:\nopcommerce\nopCommerce-release-3.90\nopCommerce-release-3.90\src\Libraries\Nop.Services\Orders\OrderTotalCalculationService.cs:line 945 at Nop.Services.Orders.OrderTotalCalculationService.GetShoppingCartShippingTotal(IList`1 cart, Boolean includingTax, Decimal& taxRate) in E:\nopcommerce\nopCommerce-release-3.90\nopCommerce-release-3.90\src\Libraries\Nop.Services\Orders\OrderTotalCalculationService.cs:line 902 at Nop.Services.Orders.OrderTotalCalculationService.GetShoppingCartShippingTotal(IList`1 cart, Boolean includingTax) in E:\nopcommerce\nopCommerce-release-3.90\nopCommerce-release-3.90\src\Libraries\Nop.Services\Orders\OrderTotalCalculationService.cs:line 888 at Nop.Services.Orders.OrderTotalCalculationService.GetShoppingCartShippingTotal(IList`1 cart) in E:\nopcommerce\nopCommerce-release-3.90\nopCommerce-release-3.90\src\Libraries\Nop.Services\Orders\OrderTotalCalculationService.cs:line 876 at Nop.Web.Factories.ShoppingCartModelFactory.PrepareOrderTotalsModel(IList`1 cart, Boolean isEditable) in E:\nopcommerce\nopCommerce-release-3.90\nopCommerce-release-3.90\src\Presentation\Nop.Web\Factories\ShoppingCartModelFactory.cs:line 1082 at Nop.Web.Controllers.ShoppingCartController.OrderTotals(Boolean isEditable) in E:\nopcommerce\nopCommerce-release-3.90\nopCommerce-release-3.90\src\Presentation\Nop.Web\Controllers\ShoppingCartController.cs:line 1543 at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) at
