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 @ 05:59
Script: /board/usercp.php?action=buddy&add=50&sid=b297ccf9f27e16f56b271d249f6ce47e
Referer: