My 'buttons' went dead about a week ago. I tried a couple of times to reauthorize and it would either error out, or not find any devices. This is what I did for success (note YMMV).
- Deleted the old SmartThings Harmony app from the iOS SmartThings app.
- Deleted the old ST integration in the iOS Harmony app.
- Resynced both the iOS Harmony app and the 950 remote.
- Built a 'new' location in the iOS SmartThings app called "Harmony".
- Put four new Virtual Dimmer devices in the 'Harmony" location in the iOS SmartThings app.
- Went back to the iOS Harmony app and BOOM, I could authorize and pull in the new Virtual Dimmers.
- Configured the UUID in the Hubitat driver like normal.
Logitech is using the new API: "api.smartthings.com" to authorize, so this should work going forward.
To note, you do not need a ST Hub if you use cloud virtual devices.
GOOD LUCK!
