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: 26.04.2024 @ 23:12
Script: /board/usercp.php?action=addsubscription&boardid=11&sid=43e863ae0ff3ff7dd17233f336bf8f6a
Referer: