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: 26.04.2024 @ 06:53
Script: /board/usercp.php?action=buddy&add=50&sid=ff3f69ec70e288470967e566d3cdc211
Referer: