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: 28.03.2024 @ 11:32
Script: /board/usercp.php?action=buddy&add=9&sid=976158d9a63f1f366d374a57c3d1a512
Referer: