That’s what I figured…
Thanks for clearing that up!
Thanks so much for all the feedback. Seems I might have some kind of mDNS issue as there have been a lot of UniFi updates lately and my Harmony can’t ‘see’ the emulated Roku either so if it can’t see that, it won’t see the emulated hue either.
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I honestly have a hard time believing that emulated_hue API just stopped working. It seems like some people have had luck as soon as a just a few months ago with getting it to work with Harmony.
There must be more to this, is there any OLD Hue application that can be used to test if this is really a depreciated API issue or if it is something else that is broken?
I get that it’s possible with a lot of work to work around it with emulated_roku but I feel like such major work arounds for something that should really work out of the box is really a last resort situation. From plenty of reading it seems like it’s not emulated_hue that is the issue but rather maybe networking, or some other configuration or conflict that might be the cause of this breaking down.
If anyone has any further ideas that would help! I’ve turned on debugging in the logs, unfortunately I cannot seem to find anything wrong. On HA’s side everything seems to work, however it seems like nothing I’ve tried so far is able to see the emulated_hue hub.
DIYHUE loaded into a docker container on a separate host seems to work with HA (instantly notifying that there is a Hue hub available) and other apps work too. While I understand it isn’t the same emulated implementation - it does show (together with OH2 plugin I was using just a few weeks ago) that the api’s out there right now DO work (v1 or otherwise).
Emulated hue has broken more times than I can count over the past 5 years. I have absolutely no faith in it.
Seems like a good idea to replace it with something that works then 
In any event I’d still like to look into this some more - so if you happen to know of any diagnostic avenues I should be looking at do let me know.
Worst case maybe I can somehow come up with a solution that would let me use Openhab’s Hue Emulator to deal with the few light/groups I need to deal with - it still seems simpler doing that than having to make some elaborate thing with roku emulation + scripting to make use of the +/- buttons on the Smart Remote.
I’m actually quite surprised that this isn’t more of a thing/issue considering how popular the Harmony hub and remotes are with home automation and the lighting/home automation buttons really work so well in that situation (IMO).
I am happy to report there is a great work around for the built in emulated hue not working.
Hopefully this helps someone else eventually!
See the thread here: diyHue Add-on
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Jumping into this thread. Saw your instructions above. I suspect that you have an Elite or Ultimate remote?
Using the companion and adding the emulated Roku in Harmony it doesn’t seem to work.
I added Roku to an activity, if I select the customize remote, the home control buttons (ligtbulbs and power outlets and + / -) don’t show so can’t select. If i listen to roku_command from dev tools nothing happens when these buttons are pressed either. So can’t just go around it from event triggers either.
So my guess is that emulated roku won’t work with the companion.
Saw now that there is a Hass Emulated Hue (I thought this was the same as the Emulated Hue) which is actually emulates a V2 bridge. Got it running and it immediately exposed all my zwave lights in the harmony app. However it does not show switches and scripts and input_boolean like the “old”/original emulated hue can do. I have never used “light template” before, but would it be possible to make switches, scripts and input_boolean to lights using that to get it picked up by the emulation and harmony?
Editing and answering my own post:
Yes light templates for controlling input_booleans was quiet simple to do.
The new Hass Emulated Hue picks the “new lights” up automatically and my Harmony Companion Rremote can use the home control buttons to control lights, scripts, covers via input_booleans.
So happy to get things working 
Lets just hope the emulator is stable unlike the old one.
Can you share how you it working with Hass Emulated Hue? I can never get the connection in Hue app working and therefor neither in Alexa, it either asks for Update which then fails or just specifies hue not found.
I am running hassio on virtual box and tried both mac addresses for hue - vbox and the wifi shared connection - in both situations hub is found but cant get Alexa to enable the skill
Appreciate your help 
Unfortunately I am to no help in that department.
I don’t have any HUE lights at all, so I don’t use the Hue app.
My only use of it is to get my Harmony Companion remote to work with the home control buttons. But have you made sure to have latest version? It seems like they release new ones quiet often?
I don’t have them either, just wanted to check if you got this working and connected eventually to Alexa to enable voice commands in hassio