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 @ 17:44
Script: /board/formmail.php?userid=1&sid=82b1233ac2e3952deb4e3c95e6e80fce
Referer: