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: 18.04.2024 @ 21:11
Script: /board/formmail.php?userid=1&sid=6f16f386ca7f05e1ed9e0eb5dddcf296
Referer: