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: 24.04.2024 @ 20:25
Script: /board/register.php?sid=056b84cae85cc7a0df7c3faebf5bf39a
Referer: