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 @ 13:28
Script: /board/usercp.php?action=buddy&add=1&sid=9d1f5e3ae472b3cb60d67c0b15f2279c
Referer: