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 @ 15:31
Script: /board/usercp.php?action=buddy&add=51&sid=b0d7c30df7f611eeca0c5d359bbfd673
Referer: