Strange URL? in the photo gallery

Hi Guys! I have a big problem!!!

In the photo gallery of the "Works" section, when you double click in some of the pictures it sent to another site that does not correspond, and it enable the option to "next picture" and "before picture" buttons

Please help me!,
thanks!

Hi,

I can't see the issue could you sen me direct URL?, but when you click on the image in your attachment page, the next/previous attachemnt should be visible and this grey image with strange title is probably from demo content, please just remove it from your media library.