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: 19.04.2024 @ 01:30
Script: /board/search.php?action=user&userid=51&sid=7cb5d6601f81e3ed1e27cbeb2e37b439
Referer: