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: 29.03.2024 @ 01:23
Script: /board/register.php?sid=d7c208bfdfe69e9ad5def214a2e7a09b
Referer: