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: 19.04.2024 @ 07:43
Script: /board/register.php?sid=d1f163f120d4a26ebc6997cc9a03e6dd
Referer: