Не открывается Security

Коллеги!
Нужна помощь!
После перехода с 14 на 15 в web интерфейсе не открывается модуль безопасность и такая ошибка:
PS из-за это не работают междугородние звонки. Бывало у кого-нибудь такое?

System.ArgumentNullException: Value cannot be null.
Parameter name: value
at System.String.StartsWith(String value)
at ConfigurationManagementModel.CountryExitCodeConverter.<>c__DisplayClass7_0.b__0(String c)
at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
at System.Linq.Buffer1..ctor(IEnumerable1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at ConfigurationManagementModel.CfgSecuritySettings.b__57_0(PhoneSystem x)
at ConfigurationManagementModel.PropertySerializer.SimplePropertySerializer`1.Serialize(ICfgPropertyInternal property, SerializeParameters serializationProperties)
at ConfigurationManagementModel.PropertySerializer.Serialize(ICfgItemInternal cfgItem, SerializeParameters serializeParameters)
at ConfigurationManagementModel.CfgItemBase.Load()
at ConfigurationManagementModel.CfgItemManager.GetItem(Object hint)
at ManagementConsoleJS.Controllers.SettingsController.RegisterActiveObject(CfgItemType itemType, PropertyFilter filter)
at lambda_method(Closure , Object , Object[] )
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__28.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at ManagementConsoleJS.Middleware.ExceptionWrapperMiddleware.d__3.MoveNext()