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: 19.04.2024 @ 23:03
Script: /board/board.php?boardid=9&sid=bd5f67aa9a4c0447ebfb8dc56bea09f2
Referer: