Everything with my Magnific Popup is functioning as desired, except for the fact that the arrows are not appearing in the gallery mode.
What I see instead is two blank boxes with a thin border on top.
After examining the CSS code, I am unable to locate any mention of an image or character insertion
When inspecting the HTML using webkit dev tools, it reveals default <button> markup with empty tags. Although the .mfp-* classes are defined in the CSS, they do not correspond to any images, and neither do the :before and :after pseudo selectors insert any characters as content.
I am unsure if I was supposed to include some images in the project. If so, what should their names be? I have looked through the documentation but could not find any reference to images...