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: 25.04.2024 @ 10:22
Script: /board/usercp.php?action=buddy&add=50&sid=1d0dc086f7e4e85cc79368585290655e
Referer: