Exporting doesn t work

WordPress plugin
Msc script
php include

Dont work give me ever the same error.

Fatal error: Class ‘ZipArchive’ not found in /home/plnsurf/planctonsurf.com/home/wp-content/plugins/caldera-engine/libs/functions.php on line 2824

http://wordpress.org/extend/plugins/my-shortcodes/