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: 28.03.2024 @ 17:32
Script: /board/usercp.php?action=buddy&add=24&sid=cfcfe4745e20b080e74ccbe64cdb8890
Referer: