Long shots, but are you extra super sure? It was kinda tough to get in properly.
What’s your GPU? Have you tried booting with your monitor using HDMI instead of DP (or vice versa)? Booting from on-board if you have it?
I ask because mine gives the same error when I try use it after booting the PC with my HDMI TV. Rift S does not work when doing this either, Oculus say it is not supported using VR with a TV plugged in.
All pretty unlikely and probably an RMA, that really sucks. :(