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: 18.04.2024 @ 21:32
Script: /board/usercp.php?action=addsubscription&boardid=4&sid=9a50518b954a4e1a56ba2fbf675e6d03
Referer: