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 @ 09:07
Script: /board/usercp.php?action=addsubscription&boardid=24&sid=d6987e8dc50756a37e7c2311992b50f4
Referer: