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: 20.04.2024 @ 07:05
Script: /board/usercp.php?action=buddy&add=54&sid=ba39f876ae0126c6ebb33585711bc2bb
Referer: