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 @ 08:11
Script: /board/usercp.php?action=buddy&add=54&sid=86e5d655b4f113ad325ca590fae20bef
Referer: