AW parameter errors

1. What happened
I'm getting NullReferenceException & ArgumentException errors when adding GO and/or Material parameter to AW, then opening the Curves view.

2. How we can reproduce it using the example you attached
Open attached AnimParamBug scene
Select "GameObject" in Hierarchy
Open AW and switch to Curves view... errors :(

note that these properties are also displayed in the list view with an expand arrow, but nothing in it.

See attached video.