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: 27.04.2024 @ 00:37
Script: /board/usercp.php?action=addsubscription&boardid=5&sid=c4439e5896cec2ed4204483694b471dd
Referer: