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 @ 10:49
Script: /board/formmail.php?userid=29&sid=b0d7c30df7f611eeca0c5d359bbfd673
Referer: