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: 29.03.2024 @ 15:45
Script: /board/register.php?sid=c9ebda5b9ec30975a3252ca8c6a26da1
Referer: