Are you in the US or the UK?
Frustrating, Iām sure. 
Iād talk to support, it should be working so somethingās off.
I am frustrated as well. I spent a couple of hours trying several things. I removed my 650 from my account, tried from my phone and two tablets, removed ST device from my Logitech setup. Made sure all 3 hubs are connected to the same SSID, rebooted all of the hubs and still nothing. All of the Logitech hubs are on the latest firmware. I donāt know what I could be missing.
Same exact situationā¦3 hubs, none connect. Iād be interested to hear some of the experience the lucky beta testers are having with the new Harmony integration, in hopes things will soon improve.
On another note, has anyone been able to get virtual devices (Ex. On/Off button) to work?
How can I sign up to get the beta software?
Donāt think beta is anymore available. Did you hook up with support?
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I did and I was basically providing suggestions as we chatted through the app and he was checking the forums then the chat just stopped and said that support is now offline. Nice.
There is a common theme within the various Harmony integration threads associated with its failure - multiple hubs are initially a problem.
I think despite the pain you have to take it down to a single hub and begin the process there. I have two hubs, and I integrated them one at a time. That was with my V1. I havenāt added them since upgrading to V2, but that is what does the trick.
Or, you could wait for Support magic.
Unfortunately I would rather not do that considering the time Iāve already spent setting them up. There has to be another way considering I have done everything to make sure everything is ready.
I had 3 remotes on my original myharmony account including non-hub remotes and smartthings app would not connect discover the Harmony Hub. I then created a brand new account on myharmony and moved the hub remote to the new account. Smartthings still wonāt discover the freakin Hub. I have opened a ticket with smartthings and waiting with fingers crossed.
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Letās go through this.
You cleared the IDE and mobile app of all Logitech things.
You have a new Harmony account setup with a new remote and hub that is no longer registered to the old account.
You added ST from within MyHarmony and authorized your ST hub and devices.
You added the Logitech Harmony Trigger smartapp.
You followed the above steps and nothing?
Yes I followed all of those steps except for clearing from IDE. Not sure why there would even be anything in the IDE after uninstalling all Logitech stuff from the Android App.
I double checked IDE anyway and found nothing related to Logitech at this point.
I am having same issue. I have tried everything suggested in this thread without success.
Iāve had the issue with adding harmony hubs to smartthings before, and it ended up being a 3rd inactive hub that I no longer used, and once I removed the inactive hub, I was able to see the other 2 hubs on smartthings.
However, after the maintenance yesterday I could not control a zwave switch, which was also heavily tied into logitech. I got a bit frustrated by it, and just removed everything relating to the switch, including logitech connect/logitech activities. Eventually I was able to get the zwave switch controllable again.
I quickly found out that the issue had come back, and that I was once again no longer able to add harmony hubs to smartthings. As usual, I can still add smartthing items to harmony, but not the other way around.
Maybe something during yesterdayās maintenance broke the ability to add harmony hubs to smartthings?
:edit: Moved one of the hubs to a different account, and left it unplugged. Still cannot see the remaining hub.
Live logging looks like this for only the harmony account that I just attempted to add:
11:52:57 PM: error java.util.concurrent.TimeoutException: Execution time exceeded 20 app execution seconds: 48384510632434 @ line 472
11:52:57 PM: trace java.net.SocketTimeoutException: Read timed out
11:52:47 PM: trace java.net.SocketTimeoutException: Read timed out
11:52:37 PM: debug valid Token
11:52:37 PM: trace Discovering devicesā¦
11:52:52 PM: warn Connection to the hub timed out. Please restart the hub and try again.
11:52:42 PM: trace Discovering devicesā¦
11:52:39 PM: debug Requesting Code
11:52:34 PM: warn Connection to the hub timed out. Please restart the hub and try again.
11:52:24 PM: debug receiveToken
11:52:24 PM: debug Exchanging code for access token
11:52:24 PM: warn No authQueryString
11:51:10 PM: debug Requesting Code
11:51:08 PM: debug About to create access token
Well, crud. Now you have me concerned. Iāll try to add mine to my V2 this evening.
I had the integration working for the Harmony in my living room but then got greedy and wanted it on the one in my bedroom as well. When I tried to connect the bedroom harmony I couldnāt get it to connect.
So I did the stupid thing and uninstalled everything and tried to start fresh.
Now it wont discover any of my Hubs and instead I have 8!!! instances of the Logitech Harmony (Connect) app in my Smart Apps list on the Home tab. When I try to into one of them I get the āYou are not authorized to perform the requested operationā error.
If I try to remove via the Marketplace nothing seems to happen?!?! I have tried to delete it via the IDE and I get a āThis SmartApp canāt be deleted at this time because it is installed by one or more usersā error. I have checked all the users and I do not see this installed.
So now not only is the integration broken, I can not even remove the smartapp. This is some sort of Kafkaesque situation going on right now with this integration.
I hope Smartthings can step in and shed some light soon!
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That occurred the first time I tried the integration. I believe it was due to my attempting to install Harmony Connect from the app instead of doing it from the Harmony side. It took Support to clear the multiple instances.
Thank you for this! I will contact support and see what they can do.