Slider not working

The slider is not working on my website.

Wordpress version: 3.9.1
Sparkling version: 1.5.0

  • I created a category ‘Slider’;
  • Enabled Slider in the Theme Options;
  • Created 2 posts in the ‘Slider’ Category, both with Featured Image;
  • Disabled and removed all plugins that could interfere with the flexslider.js in this theme.

Am I missing something?

Thanks in advance.

A full re-install of WordPress fixed the problem.