I am having the same problem since switching from my Vive headset to an Oculus Rift S. I will try the above suggestion although I would have liked the option of using both headsets. If there was another solution, it would be great to know.
Also having the same problem. I am now trying to use my Oculus Rift S with Viveport. It was working ok with my Vive headset. Some games still launch provided you clear the error in Windows. I could really do with a solution to this as haven't been able to use my subscription for most of this year. You would be able to see this I'm sure on your system login history. I have been a subscriber for some time now and I think it's maybe about time I got some use for the money I am paying every month. Thanks for any help.