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OpenXR Passthrough not working (Unity)

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I've been building my app in unity (2021.3.33f1) and bumped into an error log:

"CompositionLayerPassthroughAPI HTC_Passthrough feature instance not found."

Passthrough worked in previous version of the app. Now I just get black background. I'm using "VIVE OpenXR Plugin 2.2.0" with enabled Composition layer and Passthrough features in the XR Plugin Management. I'm also starting the passthrough with:

void OnEnable()
        ID = CompositionLayerPassthroughAPI.CreatePlanarPassthrough(LayerType.Underlay);

What might be an issue there? Please help!

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