[NullReferenceException: Object reference not set to an instance of an object.]
TrainingCourses.Controllers.CityCoursesController..ctor(UserManager`1 userManager) in G:\Development\Others\ACTrain\Final4Transfer\TrainingCourses\TrainingCourses\Controllers\CityCoursesController.cs:33
[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +139
System.Activator.CreateInstance(Type type, Boolean nonPublic) +105
System.Activator.CreateInstance(Type type) +12
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +75
[InvalidOperationException: An error occurred when trying to create a controller of type 'TrainingCourses.Controllers.CityCoursesController'. Make sure that the controller has a parameterless public constructor.]
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +242
System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +261
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +77
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +1020
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +195
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +128
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