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: 18.04.2024 @ 00:22
Script: /board/usercp.php?action=addsubscription&boardid=13&sid=30cb98cdefaf0dcf14427bd8449c34f1
Referer: