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: 26.04.2024 @ 04:27
Script: /board/usercp.php?action=addsubscription&boardid=11&sid=4e1f740bb6c3b105a7d92a9c2c428669
Referer: