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 @ 12:32
Script: /board/formmail.php?threadid=22&sid=926cbfb7636c7b8bac500b5c25d65244
Referer: