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 @ 13:10
Script: /board/usercp.php?action=buddy&add=6&sid=ee9d3e28f23eb7e52cfeedc2af262db3
Referer: