Server Error in '/' Application.

Value cannot be null.
Parameter name: key

Description: An unhandled exception occurred.

Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: key

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentNullException: Value cannot be null.
Parameter name: key]
   System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) +52
   System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) +14594060
   System.Linq.Enumerable.ToDictionary(IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer) +302
   LW.Feature.People.Repository.QualificationsRepository.GetModel() in D:\a\1\s\src\Feature\LW.People\code\Repository\QualificationsRepository.cs:79
   Sitecore.XA.Foundation.Mvc.Controllers.StandardController.Index() +180
   lambda_method(Closure , ControllerBase , Object[] ) +90
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
   System.Web.Mvc.<>c__DisplayClass24_0.<InvokeActionMethodWithFilters>b__0() +80
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +466
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +466
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +524


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0