UE4 Animation and Riggint Toolset for Maya. Deformation setup button disabled

Development Character & Animation
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When i finished skeleton placement faze i suddenly realized both “Skeleton Creation” and “Deformation Setup” buttons are disabled. So i am stuck and cannot go further. May be i am doing smth wrong or is this a bug?
I am using toolset from UE 4.8 with Maya 2016.

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up. Rly need, plz

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