Reproduction steps:
1. Create a new project
2. Create Animator Controller (Create > Animation > Animator Controller)
3. Double-click on newly created Asset to open Animator window
4. Create State or Sub-State Machine, make sure it’s not a Default State and make a Transition from Entry Node
5. Click on Entry Node and click on newly created Transition in the Inspector
6. Click on question mark icon next to the Transition settings

Actual result: “Sorry... that page seems to be missing!” Page is opened
Expected result: Transition documentation page opens or there’s no question mark icon in the Inspector

Reproducible with: 2022.3.68f1, 6000.0.62f1, 6000.2.12f1, 6000.3.0b9, 6000.4.0a4

Reproduced on: Windows 11, macOS Sequoia 15.4 (M4)