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: 29.03.2024 @ 05:46
Script: /board/formmail.php?userid=1&sid=3e75d41b9405381c602a069f2808924d
Referer: