Empty space, where the slider should be - Wordpress, header-footer

Errors:

– Empty space, where the slider should be.

– Slides are under each other.

Make sure, that your header.php file of your theme has this code in it:

<?php wp_head();?>

and that your footer.php has this:

<?php wp_footer();?>

Also it is pretty common, that in the footer.php one of the endings are missing:

</body></html>

If you can see in the source code of your website, that those ending tags are missing, but it is in your theme, check out this part of the documentation.