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 @ 01:10
Script: /board/usercp.php?action=addsubscription&boardid=24&sid=c6b3c0fd3fc17c9ed52e0fc24f2571ae
Referer: