Having a problem completing Using Splines and Spline Components tutorial

I’m working my way through the Using Splines and Spline Components tutorial (Using Splines & Spline Components | Live Training | Unreal Engine - YouTube) and I’m at the point when things should be fairly testable. I can draw out the track and get the mesh to conform to the spline but my car falls through the track when I try to drive on it. I’m using the Advanced Car template and I’ve checked that collision is set to BlockAll but I can’t interact with my spline track. The track that is included with the Advanced Car Template is still about to be driven on. The tutorial itself comes with a static mesh for the road that includes the collision. Any ideas?