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 @ 04:30
Script: /board/login.php?sid=78a351c2d9646b355d5b3a9695cb69f8
Referer: