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: 25.04.2024 @ 11:39
Script: /board/formmail.php?userid=1&sid=ce575d5dca6e66e9bddd3f7e60392132
Referer: