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 @ 17:07
Script: /board/usercp.php?action=buddy&add=51&sid=6b65b5ffb2d3074f2265b2c46f5093d7
Referer: