I have a PHP file called guestbook.php at my website novasuecia.se. It displays perfectly at http://novasuecia.000webhostapp.com/guestbook.php.
I now try to show it on my start page http://novasuecia.se/index.html using the code <?php include 'guestbook.php';?>
but nothing is shown, not even an error message.
The files guestbook.php and index.html are on the same level.
What could possibly be wrong?