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 @ 23:43
Script: /board/formmail.php?userid=1&sid=585168da55b7aec2dcff7eb10fc6d2d2
Referer: