Lesson does not load - French Verbs : Modal Lesson 4
http://www.duolingo.com/skill/fr/Verbs:-Modal/4 I've tried this on OS 10.8.5 Safari, Chrome, and Windows 8.1 Internet Explorer. Cleared cache and restarted. Basically the hourglass spins and then nothing happens.
I suggest you transfer this discussion to troubleshooting section where it belongs. Press edit and then move to troubleshooting.
I don't know if you still have the problem, but I checked earlier and just now, and for me the link you provide above, it works. If the problem persists you should report it through the support link on the left side of the page.