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: 25.04.2024 @ 04:48
Script: /board/usercp.php?action=buddy&add=9&sid=966bab0efd722cde1c3284d92660685e
Referer: