Object reference not set to an instance of an object.

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.

[NullReferenceException: Object reference not set to an instance of an object.]
GrekomaniaRu.c.b__0_0(HttpContextBase ctx) +14
System.Linq.WhereSelectListIterator`2.MoveNext() +122
System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source, Func`2 predicate) +115
System.Web.WebPages.WebPageRoute.GetRouteLevelMatch(String pathValue, IEnumerable`1 supportedExtensions, IVirtualPathFactory virtualPathFactory, HttpContextBase context, DisplayModeProvider displayModeProvider) +326
System.Web.WebPages.WebPageRoute.MatchRequest(String pathValue, IEnumerable`1 supportedExtensions, IVirtualPathFactory virtualPathFactory, HttpContextBase context, DisplayModeProvider displayModes) +327
System.Web.WebPages.WebPageRoute.DoPostResolveRequestCache(HttpContextBase context) +243
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +141
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +91