New game in 1970

[Brytenwalda]

I tried to create a new game set in 1970, using all available opponents and it crashed. This is the log:

Game time: 01/01/1970 12:00:00 AM
Version: Version 2.14 Patch I (Alpha)
01/12/2019: 10:44 PM System.InvalidOperationException: Sequence contains no elements
  at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
  at TheAirlineProjectV2.Infrastructure.Model.GeneralModel.SetupNewGameAirline.SetupAirline(Airline airline, Int32 startyear, Boolean isHuman, Boolean useStartData, Airport activeAirport) in D:\OneDrive\bureaublad\TAP\TAP Code\TheAirlineProjectV2.Infrastructure\Model\GeneralModel\SetupNewGameAirline.cs:line 42
  at TheAirlineProjectV2.Infrastructure.Model.GeneralModel.SetupNewGame.StartNewGame(Airline human, Airport preferedAirport, Int32 startyear, Int32 opponents, List`1 airlines, Boolean useMajorAirlines, Boolean useMajorAirports, List`1 regions, List`1 selectedCountries, EnumAirportSize airportSize, Boolean useContinentOpponents, RouteTypeEnum focus, Boolean useStartData) in D:\OneDrive\bureaublad\TAP\TAP Code\TheAirlineProjectV2.Infrastructure\Model\GeneralModel\SetupNewGame.cs:line 60
  at TheAirlineProjectV2.Modules.MainMenu.ViewModels.MainMenuWindowViewModel.startGame() in D:\OneDrive\bureaublad\TAP\TAP Code\TheAirlineProjectV2.Modules.MainMenu\ViewModels\MainMenuWindowViewModel.cs:line 758
  at TheAirlineProjectV2.Modules.MainMenu.ViewModels.MainMenuWindowViewModel.StartGameNext() in D:\OneDrive\bureaublad\TAP\TAP Code\TheAirlineProjectV2.Modules.MainMenu\ViewModels\MainMenuWindowViewModel.cs:line 722
  at Prism.Commands.DelegateCommand.Execute()
  at Prism.Commands.DelegateCommand.Execute(Object parameter)
  at Prism.Commands.DelegateCommandBase.System.Windows.Input.ICommand.Execute(Object parameter)
  at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
  at System.Windows.Controls.Primitives.ButtonBase.OnClick()
  at System.Windows.Controls.Button.OnClick()
  at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
  at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
  at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
  at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
  at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
  at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
  at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
  at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
  at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
  at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
  at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
  at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
  at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
  at System.Windows.Input.InputManager.ProcessStagingArea()
  at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
  at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
  at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
  at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
  at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
  at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
  at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
  at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
  at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
  at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
  at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
  at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
  at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
  at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
  at System.Windows.Application.RunDispatcher(Object ignore)
  at System.Windows.Application.RunInternal(Window window)
  at System.Windows.Application.Run(Window window)
  at System.Windows.Application.Run()
  at TheAirlineProjectV2.App.Main()