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 @ 00:17
Script: /board/usercp.php?action=signature_edit&sid=a841372f209ab84062413da7f15a9a85
Referer: