arkadaslar joomlayı kurdum fakat ne admin paneli ne de site gozukmuyo

sayfada

Not Found

The requested URL /installation/index.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

bu yazı cıkıyorum yardımcı olursanız sevinirim acemiyim bu işlerde