Question: What do you have the skeletal mesh parented to?
There are a few ways to add a body to the player character that will work depending on what you are going for.
1. Go into the dummy mover blueprint and set your skeletal mesh to the one that is part of that heirarchy. The Dummy Mover is just a regular character BP like the ones found in the Epic's Third Person and First Person templates.
2. Parent it to root of BP_VRCharacter and set its location and rotation in Event Tick of BP_VRCharacter.
3. Parent to the same capsule that the inventory objects are parented to in BP_VRCharacter.
I would not parent to the HMD at all.
I should add that I have not tested this yet, I was planning on adding an optional player body as a feature in 1.1 or 1.2. It may require some more scripting to get it to function correctly.