UE5.2 Vive-Tracker not working anymore

Hello!

I am using Unreal Engine 5.2 and Vive trackers, but they are not working.
I was following this guide with an empty vr-template-map:
https://dev.epicgames.com/community/learning/tutorials/LdR2/unreal-engine-how-to-use-vive-trackers-in-ue-5-2-and-later-versions

The base station detects the Tracker and is also visible in the VR room/transition screen. But entering the vr-template map, it vanishes.

I then tried using Livelink using the -xrtrackingonly flag (and all additional plugins needed), but it stopped working on 30.11.23, and I don’t know why.

The best case scenario would be only to use one tracker without HMD for my app. Is this even possible with a motion controller component (or does the app need to be a VR app for that)?

Does anyone have a fix for UE 5.2.1? I need to get a tracker working.

I really appreciate any help
TecK

Found the solution for the problem and I feel really dumb. If anyone encounters the same issue, here is something you can try.

https://github.com/maluoi/openxr-explorer

Setup the openxr-explorer and change the runtime to steam-vr. I though I can skip this step because it worked all the time.