Display problem on home page

Hello,

I’m contacting you because my home page seems to have a recent display problem.
Everything has been working very fine for the last months but when I checked yesterday, the home page did not display my widgets anymore (I had a Revolution Slider, a Call to Action button, a countdown and a logo slider) although I had not changed anything on my website for the last month except for updates.

This is the link to my website: http://www.ouisell.fr

Thank you in advance !