Vanilla CMS Problem

So earlier i tried to use the plugin called 'VanillaCMS' and I'm having problem you might have heard of if you have tried to use it. When I install VanillaCMS on my hosting server and extract the zip file I instantly say, "Fatal error: Class 'PageModel' not found in /home/MyaccountName/public_html/vanilla/applications/vanillacms/settings/ class.hooks.php on line 21" I've looked on the plugin page and all the threads that people have posted say they're having problem with it too and couldn't find anything that solved it. I need help please.