ZIP is not supported by your PHP installation!
If zip library (zlib) is not installed in your server you must first install it.Then you must compile php with zip support or use a pre-compiled php version with zip support included (–enable-zip)Without zip support elxis functionality will be very limited.
I was asking if you think adding a check for (if) zip is available during installation would be a good idea for future users?
http://www.apachefriends.org/f/viewtopic.php?f=17&t=52369