Sorry to hear about this since I'm waiting to receive an HP Reverb G2 myself.
Due to all issues we've seen with later versions of iCUE, I'm still on 3.30.97 which is the latest stable version for me where all my Corsair hardware (plus all other hardware) still work with no issues.
What version of iCUE are you guys on and have you tried older versions of iCUE such as the one I mention above?
If you haven't and want to give it a try, you can download it directly by going to ->
iCue Crash at Start with HP Reverb G2
in iCUE Software Troubleshooting
Posted
Thanks this works for me now. (Reverb G2 install as well)