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: 24.04.2024 @ 16:28
Script: /board/usercp.php?action=buddy&add=8&sid=a565fd7621cf906c3c91d6df0fa22eb6
Referer: