Why did the Upfront customize dashboard gone?


I was in the middle of customizing my website when suddenly the dashboard was gone. Here's the screenshot. http://screencast.com/t/AHyjl7R8

I'm using Spirit as my theme. I tried uninstalling it through FTP then installed it again but nothing happened. I even tried it using Firefox because I'm using Chrome now. I haven't installed anything before that (plugins or updates). I was just adding a new page the usual way on my WP dashboard.

I hope this will be fixed as soon as possible because we're planning to launch it this weekend.