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 @ 00:28
Script: /board/register.php?sid=4e3c212287d07022a19e7ab8bb8d76d6
Referer: