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: 25.04.2024 @ 00:41
Script: /board/usercp.php?action=addsubscription&boardid=28&sid=8daf8884d931a85bfd47af47caa776e5
Referer: