How to reproduce:
1. Open the attached “ShaderErrorBug.zip“ project
2. Select the “New Shader Graph“ Shader Graph

Expected result: There are no errors in the Console
Actual result: “undeclared identifier '_EnableProbeVolumes'“ error in the Console

Reproducible with: 15.0.6 (2023.1.2f1, 2023.1.4f1)
Not reproducible with: 15.0.6 (2023.1.1f1), 16.0.3 (2023.2.0a23)
Can’t test with: 12.1.12 (2021.3.28f1), 14.0.8 (2022.3.5f1) (No “Probe Volumes” option)

Reproduced on: macOS 13.4.1 (Intel), Windows 11 (by reporter)