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 @ 21:43
Script: /board/usercp.php?action=buddy&add=6&sid=015fb4d428ddb9c609c8ed48702e845a
Referer: