System.ArgumentNullException: Value cannot be null.
Parameter name: source
at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source)
at ASP._Page_Frontend_Assembly_ConstructionKitControls_Mvc_Views_Products_Index_cshtml_ConstructionKit_cshtml.Execute() in a:\BASF EM\CareCreations V2\TEMPDIRECTORY_TARGET\V1\root\c85f1958\decea105\App_Web_index.cshtml#constructionkit.cshtml.5fcc1e98.to_w1a8_.0.cs:line 0