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 @ 04:02
Script: /board/usercp.php?action=buddy&add=9&sid=cfcfe4745e20b080e74ccbe64cdb8890
Referer: