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 @ 17:54
Script: /board/usercp.php?action=buddy&add=6&sid=a1c625535cb1a2db3fd52cc233d45e08
Referer: