“Asset Packages/com.unity.render-pipelines.universal/Runtime/RendererFeatures/..." errors are thrown when installing or removing any package

Steps to reproduce:

1. Create a new project using Universal 3D template
2. Open Package Manager (Window > Package Management > Package Manager)
3. Install any package (e.g. "Cinemachine")
4. Observe the Console

Actual results: "Asset Packages/com.unity.render-pipelines.universal/Runtime/RendererFeatures/SurfaceCacheGlobalIlluminationRendererFeature/SurfaceCacheGlobalIlluminationRendererFeature.cs has no meta file, but it's in an immutable folder. The asset will be ignored." Error is thrown

Expected results: No Errors or Warnings are thrown

Reproducible with versions: 6000.4.0b10

Not reproducible with versions: 6000.0.68f1, 6000.3.10f1, 6000.4.0b9, 6000.5.0a7. 

Tested on (OS): Windows 11 (25H2), Windows 11 (ARM64)

Notes:

• Does not reproduce on macOS 26.2 and Ubuntu 24.04
• Package gets installed correctly
• Reproduces when both installing and removing packages
• Although this may not be reliably reproduce on 6.5 and 6.6, we believe the fix needs to be applied there as well.