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 @ 05:27
Script: /board/usercp.php?action=buddy&add=1&sid=95b51781a0f7f367e802859f036a621e
Referer: