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: 19.04.2024 @ 22:13
Script: /board/register.php?sid=f5f1a72d7a149bb7f95ed84d6df48a33
Referer: