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: 26.04.2024 @ 13:44
Script: /board/register.php?sid=5f10801b7a4e701f167a145f33b1e8e6
Referer: