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 @ 04:12
Script: /board/usercp.php?action=buddy&add=54&sid=6dc75ca2389117a7e60bc12053a918e9
Referer: