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dipRio's avatar
dipRio
Protege
28 days ago
Solved

VR Preview does not work when MetaXR plugin is enabled in Unreal Engine

This issue seems to have started after updating Meta Horizon Link to version 83.0.0.333.349.

At least with version 83.0.0.311.349, developer-specific features (such as passthrough and hand tracking) did not work, but VR Preview itself was functioning correctly.

 

Current behavior:

When I press VR Preview, the Unreal Engine preview window enters a non-VR state (the camera is fixed at floor level and does not move), and nothing happens on the Meta Quest headset connected via Air Link.

On the headset side, the Link waiting screen (the gray environment) continues to be displayed indefinitely.

 

Is anyone else experiencing the same issue?

Any information or insights would be greatly appreciated.

 

Environment:

Unreal Engine 5.5

Meta XR Plugin: 78

Meta Horizon Link: 83.0.0.333.349

question
Unreal Engine
  • korinVR's avatar
    korinVR
    15 days ago

    I've managed to fix the problem by deleting HKEY_LOCAL_MACHINE\SOFTWARE\Khronos with regedit.exe.

    I suspect there was a conflict with Steam VR or VIVE Business Streaming, which I installed a little while ago.

11 Replies

  • dipRio's avatar
    dipRio
    Protege
    28 days ago

    Update / Additional information:

    Sorry, my previous post did not include enough information. Here are some additional details and things I have already checked:

     

    What I have confirmed / tried:

     

    ・Runtime OpenXR: Set to Meta. At least according to Horizon Link, it is using Meta as the OpenXR runtime.

    ・Reinstalling Horizon Link: Tried it, but it made no difference.

    ・Restarting both PC and Quest headset: No effect.

    ・Plugin location: I moved the MetaXR plugin from the project’s Plugins folder to the Marketplace directory. This also made no difference.

    ・Switching XR API to Epic Native: This only results in VR Preview being completely unavailable.

    ・Disabling MetaXR: Yes — when using OpenXR alone, VR starts and works normally.

  • korinVR's avatar
    korinVR
    Expert Protege
    26 days ago

    I might be encountering the same problem with Unity.

    Starting a few days ago, my Unity project can't enter VR mode with the Meta XR feature group enabled. Disabling "Meta XR" works, but then the Touch controllers don't work.

    My environment is:
    Unity 6000.2.10f1
    Meta XR Core SDK 77.0.0
    Meta Horizon Link 83.0.0.333.349

  • dipRio's avatar
    dipRio
    Protege
    23 days ago

    Ultimately, this is a Meta Horizon Link issue, not a UE issue. I guess I'll just have to wait for an update...

  • Link_AJ's avatar
    Link_AJ
    Honored Guest
    23 days ago

    Same here, this plugin is driving me insane

    I'm just trying to use Passthrough in Unreal

  • dipRio's avatar
    dipRio
    Protege
    15 days ago

    I updated to v85, but has anyone been able to fix these issues?

    VRPreview still doesn't work when using MetaXRPlugin, and even using the standard OpenXR VRPreview causes the headset screen to go black (though this may be a personal issue).

    • korinVR's avatar
      korinVR
      Expert Protege
      15 days ago

      I've managed to fix the problem by deleting HKEY_LOCAL_MACHINE\SOFTWARE\Khronos with regedit.exe.

      I suspect there was a conflict with Steam VR or VIVE Business Streaming, which I installed a little while ago.

  • dipRio's avatar
    dipRio
    Protege
    14 days ago

    This method solved all my problems! Thank you so much!!!

  • q.w.j.2026's avatar
    q.w.j.2026
    Explorer
    14 days ago

    This method solved my problems! Thank you so much!!! You are my God！！！

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