RenderTexture.Create failed: width & height must be larger than 0

What does this error mean? I didn’t create any RenderTexture though:vv

RenderTexture.Create failed: width & height must be larger than 0 UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)    

It happened when I played my game and even when I didn’t too. The illustrating Image:

open Game view
then Open Aspect Ratio options
then select 4k UHD