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: 20.04.2024 @ 12:25
Script: /board/register.php?sid=c77dbd35b8a9ec8c451006320c26f3a6
Referer: