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 @ 02:43
Script: /board/register.php?sid=c6b3c0fd3fc17c9ed52e0fc24f2571ae
Referer: