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 @ 19:52
Script: /board/usercp.php?action=addsubscription&boardid=13&sid=8c7470e199d6368705d6d6809f84fbba
Referer: