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 @ 16:31
Script: /board/register.php?sid=dac97f1e140a76f6a5fec4121e4f3ccd
Referer: