Graphql @relationshipProperties error

The method of querying relationship properties via graphql as outlined here does not seem to work.

I tried to implement it in my own schema and could not get around the errors. When I copy paste the provided schema from the example into my schema, and then copy paste the provided query, I get the same type of error:

"Cannot query field actorsConnection on type Movie."

What am I missing here?

oops we were using an old version of the library