Solved!!
you have to write the footer.php
if you open it you will find something wrong!
I wrote the following text and.. wow! it works!
?>
</div><!– .site-content –>
<footer id=”colophon” class=”site-footer” role=”contentinfo”>
<div class=”site-info”>
<?php
/**
* Fires before the Twenty Fifteen footer text for footer customization.
*
* @since Twenty Fifteen 1.0
*/
do_action( ‘twentyfifteen_credits’ );
?>
Proudly powered by WordPress </div><!– .site-info –>
</footer><!– .site-footer –>
</div><!– .site –>
<?php wp_footer(); ?>
</body>
</html
