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: 19.04.2024 @ 20:49
Script: /board/usercp.php?action=buddy&add=66&sid=a4ef74e8c59018be5d8b0932544d1f40
Referer: