Why did Google chrome stop showing previews?

Question

Google Chrome

DD.
First he teaches, and then he torments, how else to express himself to chrome after this? =)
How many times have problems with previews on the Empty tab, I don't know how they are called Popular sites?
In general, basically, he simply lost links and after some time showed them again. now I see this for a day now:

What can be done with it? And is it possible to somehow specify the sites yourself, otherwise sometimes instead of a picture you click on the cross next to the picture and then you don’t know how to return it, although PPC is used to opening this site at this place.
Mac OS X, Chrome 50.0.2661.102 (64-bit)
thanks in advance

Answer 1

A friend had the same problem, cleaned his permissions and in the components of the "unknown" applications, the tabs stopped disappearing.