TimePicker - hours are not int he dropbox

I've used this component, and its fairly easy to use.

But somehow the widget doesn't form dropbox. The hours are shown in a line below the input. 

Any ideia what's happening?

Can you check the browser tools (F12) console, and see if there are any errors occurring? Perhaps one of the CSS or JS files isn't getting loaded.

You might also try refreshing the page using Ctrl+F5 or Shift+F5 to reload without cache.