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: 23.04.2024 @ 17:11
Script: /board/formmail.php?threadid=842&sid=5fad3f35a1b0f9a6ab39c12d28a52f65
Referer: