"Search Box" disappeared from sidebar after upgrading Wordpress

I just upgraded Wordpress on my site inspirefusion dot com, everything remained same but just the Search Box disappeared from the sidebar.

I can see it in the "Widgets" section that it is still there, even if I go to "Customization" menu I can see the search box appear on the site, but it doesn't appear when you open the site.

You can see it yourself, I have placed the search box below the "Categories" and above of "Random Posts".

You can see these screenshots to understand better;

1. When seeing the site normally - http://i.imgur.com/oD0MrKZ.jpg

2. When seeing from Customization Menu - http://i.imgur.com/cKQCllN.jpg

Why is it not showing on the site, any idea?