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: 26.04.2024 @ 18:01
Script: /board/register.php?sid=f7597d8e84acd8f8e0a584cdc31ca4b4
Referer: