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: 18.04.2024 @ 21:34
Script: /board/register.php?sid=0ecc0e4c8235944c52ccd9f9d4696b84
Referer: