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 @ 05:29
Script: /board/formmail.php?threadid=932&sid=79c965e73f0ee75bf7137c576ad2dfb3
Referer: