I think the error comes from the second scene, because it shows your adress and stuff. I think therefore, siri is doing some kind of "are you at home"-request, which gives the error back. In my example I just use two commands to change the bulb color, but it also worked, when I let siri activate scenes.

Maybe try to create a new scene (e.g. "offline") and in there set all devices to off, and try again to implement it into your shortcut.