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: 29.03.2024 @ 02:14
Script: /board/usercp.php?action=buddy&add=43&sid=17f71c051fcfc788915e8d2127109045
Referer: