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 @ 10:39
Script: /board/register.php?sid=a9a94e09201466a4fb3e31d9c198a8d8
Referer: