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: 08.05.2024 @ 11:50
Script: /board/usercp.php?action=buddy&add=50&sid=017e8cbd3a5f8c355a2a52d807f6bb94
Referer: