Error Creating Texture and Sprite

I created this very basic script so I could easily add Rectangles to my game, but for some reason when I run the game the rectangles give me the following errors:

rd->texture.IsValid()

And

rd->texture.IsValid()
UnityEditor.DockArea:OnGUI()

The rectangles display and work fine during gameplay, so why am I getting these errors?

Error Creating Texture and Sprite