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: 19.04.2024 @ 18:52
Script: /board/formmail.php?userid=1&sid=e9a7507911ffea8b6183164369f71a44
Referer: