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: 19.04.2024 @ 01:51
Script: /board/usercp.php?action=buddy&add=8&sid=d225e37928af13423baa04e48048af0c
Referer: