The command /portal portal still appears in the command list when typing /portal help even tough it doesn't work and the changelog for the latest version mentions it being removed ("Removed portal portal as it did nothing.").

EDIT: I'm using version 0.0.21.

I it works in one of the older though support has been removed for it. I will add a new build which adds a placeholder for you to place.

This is listed in another issue so i will close it for now though i will post on here once it is done :)