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: 24.04.2024 @ 10:20
Script: /board/usercp.php?action=buddy&add=53&sid=5f1b9e9c9bcc2bbad1ba8d3958dc3b3b
Referer: