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: 19.04.2024 @ 20:22
Script: /board/usercp.php?action=buddy&add=66&sid=d7c208bfdfe69e9ad5def214a2e7a09b
Referer: