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: 16.04.2024 @ 08:52
Script: /board/register.php?sid=10f2e01f0e1b6270d93d75f7fd4ffab3
Referer: