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: 26.04.2024 @ 11:07
Script: /board/usercp.php?action=buddy&add=3&sid=b433e52806f3ec6c4a2e1403ccf10eaa
Referer: