Unity 6000.2 has reached its end of life and will not receive further updates. If you need additional fixes, please upgrade to a newer Unity version.
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