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 @ 04:58
Script: /board/usercp.php?action=buddy&add=41&sid=b140e4efa2b0a84478d27b3b54b580e7
Referer: