Posts no more visible

Suddenly, one week ago, my posts were no more visible. The posts are all still there in my published posts archive, but none is visible on the main blog page. I have not recently updated or added any component. The banner and the sidebar are ok, and Pages are ok too (so, apparently it is not a problem with the Theme – K2-lite). Also, the blog is perfectly visible from the mobile, the problem is only associated with computers (any browser). A strange situation, indeed. Any suggestion? Thanks a lot!

The page I need help with: [log in to see the link]