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: 20.04.2024 @ 15:44
Script: /board/register.php?sid=5488c181c80f5a5298d5565d8f81e35b
Referer: