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: 24.04.2024 @ 19:07
Script: /board/formmail.php?userid=1&sid=d85d8448eca3df04864c9089d516bf51
Referer: