Configuration Error accessing Cloud API from Rules Engine

I am developing in the Rules engine and I have come across the Particle API node.

If I out in “/v1/devices” into the URL field, as per the instructions at https://docs.particle.io/reference/device-cloud/api/#devices

I get the expected enumerated array of defined devices in my system.

However, if I put “/v1/devices/:device id”. using my device id, of course, the node returns “configuration error”. Any way of experimenting and rephrasing the URL leads to the same message.

I know I’m close. Any suggestions?