Can't show Leaderboard on holesky network

On holesky network, Leaderboard page
https://ethernaut.openzeppelin.com/leaderboard is blank, and F12 shows: 

GET  https://raw.githubusercontent.com/OpenZeppelin/ethernaut-leaderboard/update/boards/networkleaderboards/HoleskyLeaderBoard.json
Status 404

There are some files missed for holesky network?


Thanks if it's known issue.
