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: 23.04.2024 @ 07:45
Script: /board/usercp.php?action=buddy&add=1&sid=b7ba5c8717ca4ccbc2b56249cc1f0d2e
Referer: