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 @ 00:55
Script: /board/usercp.php?action=addsubscription&boardid=7&sid=a90c355c43b7bba3a4341fb83b906300
Referer: