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: 24.04.2024 @ 09:00
Script: /board/register.php?sid=1c76bb96242ac5c0dede5b9bb3d3816a
Referer: