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: 25.04.2024 @ 15:46
Script: /board/formmail.php?userid=1&sid=6fcacd6c8f9a16eaf066f42a06425e7f
Referer: