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: 29.03.2024 @ 01:37
Script: /board/usercp.php?action=addsubscription&boardid=9&sid=5f58ef1b628cee0177b1781754cc2e12
Referer: