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: 18.04.2024 @ 07:10
Script: /board/register.php?sid=8f894a6c45b069b4bcc8e7fc541a53a8
Referer: