Getting this error every time I open my project:
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.CurveEditorWindow.OnDestroy () (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/CurveEditorWindow.cs:259)
UnityEditor.WindowLayout:LoadWindowLayout(String, Boolean)
Same. It’s in Beta 10 though - will try newer first before report.
Me 2… Exact same error on newest Unity 2017.1.0f2 - Release Candidate 2 … Although was only sometimes when first launching Unity opening my game. I cleared it in the Console… Ran build for android, all seems ok I guess but I do get the odd Crash report error on the Google play store… Hopefully this doesn’t crash, while playing the game. 
java.lang.Error
android.graphics.Canvas.throwIfCannotDraw
The CurveEditor null reference is fixed in f3.
I cannot find any bug reference to the throwIfCannotDraw. Would you please send a bug report?