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: 08.05.2024 @ 01:04
Script: /board/usercp.php?action=buddy&add=54&sid=49dfe65a172b3798e7d20625bde7e27b
Referer: