When I try to add an embeddable host with the host: http://192.168.1.167:3000 then it tells me that the host is invalid.
If I remove the port number, as so: http://192.168.1.167, then everything works.
Here’s a video of the issue in detail:
I’m currently working on https://github.com/discourse/discourse/commit/4d4a1a1552444ff1d6cb47d019950ad01e72547f on Mac with Vagrant.