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 @ 04:47
Script: /board/usercp.php?action=addsubscription&boardid=28&sid=9f3e1d24ece4b23792c4ae326e4380b9
Referer: