The cinecamera won't attach to the camerarigrail

I have been trying for several days to get the cinecameraActor to attach to the camerarigrail and move along the rail as described in the Boundless Resources tutorials.

I have recreated the sequence, and deleted rigrails, and reinstated them.

I am up against something obvious and can’t seem to get it to work properly.

Any answers?

Would anyone care to Zoom call share screen and show me the one missing step I seem to be missing?