Bug Last days I'm getting this error : EndLayoutGroup: BeginLayoutGroup must be called first.

EndLayoutGroup: BeginLayoutGroup must be called first.
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)

When I click on it in the console window there is no script name no lines numbers only the error that is thrown for at least 8 times now and keep being thrown all the time.

It's a clean new project and happened on other projects too.
I'm using now unity3d version : 2019.4.0f1 personal

Ok I think I figured out when it happens. I'm not sure if unity will support it but when I imported a new Mixamo character from Mixamo.com when in the Inspector I click in the Materials tab of the character and then on Extract Textures... after extracted the textures the error show.

I don't think it's making any problems in the project I can still run the game. I just wonder if there is a way to solve it ?

In the screenshot it's only shows twice now but that's because I cleared before the console window.