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 @ 04:01
Script: /board/usercp.php?action=buddy&add=53&sid=5dab0b3fe9c648cb9be0f487f7dcf490
Referer: