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 @ 20:01
Script: /board/formmail.php?userid=1&sid=cd8f94fd7a87f07feb85d802b2b2894d
Referer: