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 @ 05:17
Script: /board/usercp.php?action=buddy&add=3&sid=5e0d9de17b5a4fb1bd9622c4c8d314a5
Referer: