As Veucci mentioned above, you have a reference problem there.
I’m not sure what your VRRoot Reference is actually referencing but it is obviously not a “Mover Component” which is the only thing that can be plugged into that target. The reference chain looks something like this
so if your VRRoot Reference is a reference to the root component of the Actor then you’ll never be able to get the mover component as it is not a child of another component within the actor.
But the other question is, what are you trying to do with this? If you are just trying to get the velocity of a character then you can simply grab any actor reference and get it’s velocity.
This grabs an actual actor reference from its root component so you don’t need to specify the component, and if you are simply looking to get the actors speed this is usually all you’d need.
Or are you actually trying to use the experimental Mover Component and get its actual velocity?