MRUK LoadSceneFromDeviceAsync() Always Returns False

Hi everyone, I'm working on an MR project in Unreal Engine 5.7 using Meta Quest 3 with a PCVR offline setup (Quest Link via USB). I want to place virtual objects at fixed real-world positions, so I'm trying to use MRUK's LoadSceneFromDeviceAsync() along with UMRUKAnchorActorSpawner. However, LoadSceneFromDeviceAsync() is returning false and I'm unable to load the scene.

Things I have already checked:

1. Requested com.oculus.permission.USE_SCENE and com.oculus.permission.USE_ANCHOR_API

2. Completed Space Setup on Quest 3

3. Spatial anchors & scene support enabled in project settings.

4. Share spatial over Link is enabled in Meta Horizon link.

Has anyone successfully used MRUK Scene API with Quest Link/PCVR? Is there any additional setting required for LoadSceneFromDeviceAsync() to work?

Any help would be appreciated. Thanks!