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: 25.04.2024 @ 01:50
Script: /board/usercp.php?action=buddy&add=54&sid=1a2a60f2b3b08ca532912894026c91c1
Referer: