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 @ 07:21
Script: /board/board.php?boardid=5&sid=a02bc4043896d0a76231b0b340c4c566
Referer: