First of all, I'm sorry for my english. I didn't search if anybody has the same problem because I don't know the good words for my problem.

In the start menu, I have some "case" which are link in some website I like. Some months before, there was images in these box. For example, I have a link to Facebook. So, some months before, there was an image in the box which represent my facebook page. An other example; if I see an image on the web that I like, I put the link in my start page, and the box shows the image. However, today, all the images disappeared. Instead of the images which show website, I see a color background with the name. So "Facebook" became "Facebook.com" with a blue background.
It's a problem for me because I have some habit in Opera with the images. It is quite disturbing to don't see these images ...

http://image.noelshack.com/fichiers/2017/09/1488542245-sans-titre-1.jpg

Here is a screen of my start page (Yes, I have Google Translate for helping me °° ). What is the problem ? Can you help me to resolve it ?
I am on Opera 43.0.2442.1144, in Windows 10 64 bit.

Thanks for your help !