Server Error in '/0' Application.

Добрый день!

Являюсь новичком. Поэтому прошу Вас помочь для устранения данной ошибки.

Установил и настроил все как скзано руководстве.

1. Добавил все роли и компоненты

2. Добавил вед сайт.

3. Для вебсайта добавил приложение .

После запуска выводит сл. ошибку.

Object reference not set to an instance of an object. 
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
 
 Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
 
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: 
 
 
 
[NullReferenceException: Object reference not set to an instance of an object.]
   Terrasoft.Core.UserConnection.InitializeDBExecutor(AppConfigurationSectionGroup appSettings) +148
   Terrasoft.Core.UserConnection.Initialize(AppConfigurationSectionGroup appSettings) +134
   Terrasoft.Core.AppConnection.InitializeSystemUserConnection(ConfigurationSection schemaManagerProviderConfigurationSection) +114
   Terrasoft.Core.AppConnection.Initialize(ConfigurationSectionGroup appConfigurationSectionGroup) +557
   Terrasoft.WebApp.Global.InitializeAppConnection() +472
   Terrasoft.WebApp.Global.Application_Start(Object sender, EventArgs e) +258
 
[HttpException (0x80004005): Object reference not set to an instance of an object.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +520
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +176
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +165
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +353
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +341
 
[HttpException (0x80004005): Object reference not set to an instance of an object.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +523
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +107
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +688
 
 
 
 
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3062.0 

Прошу помочь с решение данной задачи.