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: 23.04.2024 @ 21:29
Script: /board/usercp.php?action=addsubscription&boardid=9&sid=dd011866d64d04774eaea043bdf9e239
Referer: