Reproduction steps:
1. Create a new project
2. Create a Shader Variant Collection Asset (Create > Shader > Shader Variant Collection)
3. Click on newly created Shader Variant Collection Asset
4. Click on question mark icon in the Inspector

Actual result: “Sorry... that page seems to be missing!” Page is opened
Expected result: Shader Variant Collection documentation page opens

Reproducible with: 6000.3.0a1, 6000.3.0b10, 6000.4.0a4, 6000.5.0a1
Not reproducible with: 2022.3.68f1, 6000.0.62f1, 6000.2.0b2, 6000.2.12f1

Reproduced on: macOS Sequoia 15.4 (M4)