Exception : Value cannot be null.Parameter name: source App Error Log : - Employee ID : 2218 Action Name : Login Model : System.Web.Mvc.HandleErrorInfo Controller : Login Web Error Log : at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate) at WORKTERRA.CommonClass.CheckPageEligibility(WorkflowModel& objWorkflowModel, Int32 CurrentPageCount) in c:\WT\branches\UiRefresh\Web\SharedFunctionWebTier\SharedFunctionWebTier\CommonClasses\CommonClass.cs:line 3146 at WORKTERRA.CommonClass.BenAdminEmployeeWorkFlow(Hashtable SessionHash, WorkflowModel objWorkflowModel) in c:\WT\branches\UiRefresh\Web\SharedFunctionWebTier\SharedFunctionWebTier\CommonClasses\CommonClass.cs:line 2958 at WORKTERRA.CommonClass.CheckBenAdminURL() in c:\WT\branches\UiRefresh\Web\SharedFunctionWebTier\SharedFunctionWebTier\CommonClasses\CommonClass.cs:line 2399 at WORKTERRA.CommonClass.GetCompanyModuleDetails() in c:\WT\branches\UiRefresh\Web\SharedFunctionWebTier\SharedFunctionWebTier\CommonClasses\CommonClass.cs:line 2154 at WORKTERRA.CommonClass.CheckWorkterraURL() in c:\WT\branches\UiRefresh\Web\SharedFunctionWebTier\SharedFunctionWebTier\CommonClasses\CommonClass.cs:line 1984 at WORKTERRA.SharedFunctionWebTier.GetURLForNavigation(ModuleId objModuleId, Boolean Navigate, String EmployeeQuickLinkNavigationURL) in c:\WT\branches\UiRefresh\Web\SharedFunctionWebTier\SharedFunctionWebTier\CommonClasses\SharedFunctionWebTier.cs:line 1469 at WORKTERRA.Shared.Models.UsersModels.AuthenticateUser() in c:\WT\branches\UiRefresh\Web\Web Projects\WORKTERRA\Models\Login\Login\UsersModels.cs:line 113 at WORKTERRA.Shared.Controllers.LoginController.Login(UsersModels objUsersModels) in c:\WT\branches\UiRefresh\Web\Web Projects\WORKTERRA\Controllers\Login\Login\LoginController.cs:line 183 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.<>c__DisplayClass42.b__41() at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.b__7(IAsyncResult _) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.b__33() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.b__49() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.b__36(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.b__20() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.b__22(IAsyncResult asyncResult)