Images not showing in front-end

Hi,
I have a problem with the featured images. After I post something and set featured image, that image is not showing in front-end. Seems that the link for the image is somewhere in a folder named wp-content/uploads/gk_nsp_cache. I checked on my server and there is no such folder so is a broken link problem. I set permissions to 777 to all folders and subfolders but no luck. Can you please tell me what is the issue? Here is the link so you can see what I am talking about http://mdash.go.ro/. You can see it on the homepage.
Thanks alot!

Hi,

Is the issue already solved? Because I can see your post featured images now on your homepage.