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 @ 19:21
Script: /board/usercp.php?action=buddy&add=54&sid=5b7ef83b10540dfc232bbac1b03e62ca
Referer: