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: 23.04.2024 @ 23:29
Script: /board/usercp.php?action=buddy&add=54&sid=357b3c978d86c7d5d4979d130db3c09f
Referer: