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 @ 17:32
Script: /board/register.php?sid=a2f8d9d06d017a0416d1770c58cb7586
Referer: