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: 20.04.2024 @ 04:01
Script: /board/formmail.php?userid=1&sid=8044f8db852ac082d85f715505479bc8
Referer: