Camera Stuck in the Floor, 'Primitive Component Error'?

When I hit play, the camera slides into the floor, then doesn’t move.

Here’s the blueprint I’m using for the camera:

Here’s what the blueprint looks like during play, even after I run some distance away:

The error Unreal gives me is:

Warning Movement component RotatingMovement1 must update a PrimitiveComponent, but owning actor ‘LeashedCameraBlueprint_C_0’ does not have a root PrimitiveComponent. Auto registration failed.

I’m so close to finally finishing the camera so I can start proper work on the game. Anything you could offer would be great.

Thanks a ton in advance!