Error using getPixle, the error is "NullReferenceException: Object reference not set to an instance"

Unity Engine
1

The error is

the code is

Texture2D img = Resources.Load(@"\images\1") as Texture2D;
Color try1 = img.GetPixel(0,0);
print(try1.ToString());
2

Texture2D img = Resources.Load(“images/1”) as Texture2D;

Does it actually exist in the Resources/images/ folder?