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: 19.04.2024 @ 17:49
Script: /board/formmail.php?threadid=842&sid=8c1bcaaed7d4a8c9503867771949e7ae
Referer: