Safari has stopped working

Out of the blue, it stopped loading any pages at all. I tried to reset it, the wi-fi works fine on ipad and iphone but on both macbookpro it just stopped working. When i try to acces a page it appears quarter half blue, like trying to load, but the tab remains untitled and nothing since noon has happend. I din't do anything, have not installed anything whatsoever.

What should i do?