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: 25.04.2024 @ 08:06
Script: /board/usercp.php?action=addsubscription&boardid=6&sid=83c5d80f2680f5398a835b1e8e2cb52f
Referer: