Screen position out of view frustum (601844)

I need some help.

When i open the unity, appear the error :
Screen position out of view frustum (screen pos 0.000000, 0.000000, 0.300000) (Camera rect 0 0 0 0)
UnityEditor.DockArea:OnGUI()

How i fix that ?

Screenshot :

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I’ve been getting this same error message when I open Unity as well. It does not appear to affect compiled code, and only occurs while Unity is starting up. At first I tried manipulating the camera and other stuff, until I realized it had nothing to do with the scene itself. This error seems to be pointing to the Unity UI, and appears to indicate that some portion of a docked element is outside of view.

I’ve been getting this also every time I open Unity 5.2.