Extension:HeaderFooter seems to not work in UserProfile namespace
https://lol.gamepedia.com/UserProfile:RheingoldRiver example
Steps to reproduce a more straightforward example on a not-my wiki:
- Enable HeaderFooter
- Create MediaWiki:Hf-nsheader-UserProfile with any content
- View a profile
- Expected: The header content is visible. Actual: There is no header content.