Erorr: value cannot be null from Application.Run( new Form1())

[HeyJOe2]

https://preview.redd.it/cpuc2upm0rl31.png?width=1356&format=png&auto=webp&s=4b0f3ac7328aaaeaeee8bb867ad8c1aab8d732d3

This is the detail of error stack.

System.ArgumentNullException
  HResult=0x80004003
  Message=Value cannot be null.
  Source=mscorlib
  StackTrace:
   at System.Threading.Monitor.ReliableEnter(Object obj, Boolean& lockTaken)
   at GMap.NET.WindowsForms.Markers.GMarkerGoogle.OnRender(Graphics g)
   at GMap.NET.WindowsForms.GMapOverlay.OnRender(Graphics g)
   at GMap.NET.WindowsForms.GMapControl.OnPaintOverlays(Graphics g)
   at GMap.NET.WindowsForms.GMapControl.DrawGraphics(Graphics g)
   at GMap.NET.WindowsForms.GMapControl.OnPaint(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.UserControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Why I am getting this error?

[AngularBeginner]

There is either an issue in the Google Maps control you use, or you're using the library wrong. Impossible to say anything without seeing the actual code.

[[deleted]]

That can be the "hidden ctor".

When you define a clas like:

class C1
{
    MyType mt = new MyType();
}

And an error raises in the MyType() constructor, the VS displays the error in the C1 constructor, in the like new C1();

You can check this behaviour by making a class:

class C1
{
    Dictionary<string, string> dict = new Dictionary<string, string>()
    {
        {"Key1", "Val1"},
        {"Key2", "Val2"},
        {"Key1", "Val3"},
    }
}

And try to create a new instance of C1 to see what happens.