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: 18.04.2024 @ 02:54
Script: /board/usercp.php?action=addsubscription&boardid=2&sid=6bdbdd81f3930fc7e62bbd7ea7956199
Referer: