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: 20.04.2024 @ 05:03
Script: /board/usercp.php?action=buddy&add=3&sid=a596ae2ddf3a77a4c60c51e6a42a9f85
Referer: