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: 26.04.2024 @ 09:54
Script: /board/formmail.php?userid=29&sid=cfcfe4745e20b080e74ccbe64cdb8890
Referer: