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: 25.04.2024 @ 15:39
Script: /board/register.php?sid=e4bbb8f412d6893f229b3a25e7fd9bc1
Referer: