Reproduction steps:
1. Create a new project
2. Create any Shader Graph (Create > Shader Graph)
3. Select newly created Shader Graph, right-click and select “Create Node” option
4. Create a Node that will show error icon (e.g. Input > 2D > Light Texture)
5. Observe the error icon

Actual result: Non-standard error icon is used
Expected result: Standard error icon is used

Reproducible with: 6000.0.65f1, 6000.3.4f1, 6000.4.0b4, 6000.5.0a4

Reproduced on: macOS Tahoe 26.2 (M4)