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: 23.04.2024 @ 06:34
Script: /board/usercp.php?action=addsubscription&boardid=9&sid=b7be8bff74da5b37908861ce706a4e2e
Referer: