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 @ 06:56
Script: /board/register.php?sid=a596ae2ddf3a77a4c60c51e6a42a9f85
Referer: