After updating to Version 3.2 I receive the following error...
The parameters dictionary contains a null entry for parameter 'categoryId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult OffCanvasMenuCategories(Int32, Int32, Int32)' in 'SmartStore.Web.Controllers.CatalogController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
Parameter name: parameters