I tried that but it still does not work. I changed host and restarted from scratch the wordpress site and installed the theme again. Now I get a new error:
error: require() [function.require]: Failed opening required ‘/home/u551170531/public_html/wordpress/wp-content/themes/zerif-lite/inc/jetpack.php’ (include_path=’.:/opt/php-5.3/pear’) in /home/u551170531/public_html/wordpress/wp-content/themes/zerif-lite/functions.php on line 516