[=“Matt_GrooveJones, post:144, topic:100191”]
The Vive still appears to be broken in 4.18 Preview 4 (HMDDevice isn't recognizing the - XR Development - Epic Developer Community Forums)
[/]
If anyone else is still having this issue, check that your SteamVR is up to date. Only the very latest version (1.50) works with Preview 4, so if you’ve missed an update it won’t recognize the headset.