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Known Issues

Hardware Issues​

HP Reverb G2 — Controllers Not Working​

HP Reverb G2 Bug

With the HP Reverb G2 headset, Unity incorrectly recognizes the controllers as XRHandDevice instead of HPReverbG2ControllerOpenXR, resulting in no access to physical buttons.

Solution: Set Windows Mixed Reality as the OpenXR runtime instead of SteamVR.

See Virtual Reality setup for configuration details.

Errors​

FwdForwardRenderer_LowEndMobile is missing RendererFeatures​

Description: Some Render Features are not imported correctly during installation.

Solution: In the Project window, select the WEAVR/Essential/Rendering folder, right-click → Reimport.

Release of invalid GC handle. The handle is from a previous domain.​

Description: Unity Garbage Collector issue. Not related to WEAVR.

Solution: Can be safely ignored.

Default Renderer is missing, make sure there is a Renderer assigned as the default on the current Universal RP asset​

Description: URP configuration warning.

Solution: Can be safely ignored.

ArgumentNullException: Value cannot be null. Parameter name: shader​

Solution: Can be safely ignored.

System.Reflection.TargetInvocationException — CalculateJointTransformLocalPoses​

Solution: Can be safely ignored.

Could not allocate memory. System out of memory. (ARKit)​

iOS ARKit Memory Leak

This error is caused by a memory leak in the Apple ARKit XR Plugin.

Solution: Remove "com.unity.xr.arkit" from the package.json in the WEAVR package main folder. Re-run WEAVR > Setup > Project For > AR after removing it.

Missing Materials or Rendering (Pink/Magenta Objects)​

Fix for Missing Materials
  1. Go to WEAVR > Setup > Project For > and execute the appropriate option for your platform
  2. Reimport the WEAVR/Essential/Runtime folder in the Project window

Missing Scripts​

General Scripts​

Description: Some general script references are not recovered correctly during installation.

Solution: Reimport the WEAVR/Essential/Runtime folder.

VR Scripts​

Description: Some VR script references are not recovered correctly during installation.

Solution: Go to WEAVR > Setup > Project For > and execute one of the VR platform options.

Warnings (Safe to Ignore)​

Shader / DirectX Warnings​

Any warning related to Shaders and DirectX during compilation can be safely ignored.

XR Plug-In Management Timeout​

XR Plug-in Management Warning: Timeout trying to get package list after 30s.

Description: Package import timeout — this is a Unity issue, not WEAVR-specific.

Solution: Can be safely ignored.

HoloLens / MRTK Missing Scripts in Prefabs​

Description: Warnings about missing MRTK scripts in prefabs when not using UWP.

Solution: Can be safely ignored unless building for HoloLens. To resolve: switch the build target to Universal Windows Platform (UWP).

Unsupported Features​

Fast-Forward Debug​

Description: Some actions and conditions do not support Unity's fast-forward debug mode.

Workaround: Test in normal Play mode for affected steps.