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: 08.05.2024 @ 00:15
Script: /board/usercp.php?action=addsubscription&boardid=2&sid=d3ca2a57a2c61bcc1d70ba6c213fd6b6
Referer: