System.ArgumentNullException: Value cannot be null. Parameter name: source at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate) at PartnerTools.DomainModel.Steps.Common.ContentStep.b__32(PstActivity pstActivity) in D:\Intermedia\IntermediaNET\Tools\PartnerTools\PartnerTools.DomainModel\Steps\Common\ContentStep.cs:line 172 at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext() at System.Linq.Buffer`1..ctor(IEnumerable`1 source) at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source) at PartnerTools.DomainModel.Steps.Common.ContentStep.GetActivities(String sSearch) in D:\Intermedia\IntermediaNET\Tools\PartnerTools\PartnerTools.DomainModel\Steps\Common\ContentStep.cs:line 170 at PartnerTools.Web.Controllers.Onboarding.BaseOnboardingContentStepController`2.GetContentProgressDetailsList(String search) in D:\Intermedia\IntermediaNET\Tools\PartnerTools\PartnerTools.Web\Controllers\Onboarding\BaseOnboardingContentStepController.cs:line 152 at lambda_method(Closure , ControllerBase , Object[] ) 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.ControllerActionInvoker.<>c__DisplayClass15.b__12() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)