SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Link-ID == false, connect failed
mysql error: The server requested authentication method unknown to the client
mysql error number: 2054
Date: 08.05.2024 @ 15:06
Script: /board/search.php?action=user&userid=18&sid=017e8cbd3a5f8c355a2a52d807f6bb94
Referer: