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 @ 22:49
Script: /board/register.php?sid=5fad3f35a1b0f9a6ab39c12d28a52f65
Referer: