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: 20.04.2024 @ 09:45
Script: /board/usercp.php?action=addsubscription&boardid=2&sid=3499a2cc0a8c1f723f47762f3b476e24
Referer: