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: 20.04.2024 @ 13:03
Script: /board/formmail.php?userid=1&sid=3e85907e2a3396e76e9312d21dabbe08
Referer: