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 @ 04:28
Script: /board/register.php?sid=fc2cbb88ad7053b6b9ab5d9ac1668bf6
Referer: