How do you use this mod? I've built and placed 2 teleporter platforms, but I can't step on it and I don't see any interface icon anywhere.

Do you use some mod like hovercraft? you should be able to stand on top of the teleporter

Thanks for the hint, Klonan. I had the same problem of not being able to walk over the teleporters, disabling the Hovercraft mod fixed it.
The problem seems to come from the additional collision mask added to player character. There are several threads on the discussions page reporting similar issues of not being able to walk over objects, that are generally traversable.