Problems with Media & Galleries

I have researched this over and over again and for some reason cannot find a solution. My website is https://photography.modernrevolutions.net and since it is a photography portfolio I must use a lot of galleries and pages to host those galleries. However, when I go into the Gallery or the Page, it doesn’t show my images at all. Not a list, nor thumbnails, literally nothing. I’ve checked the folder permissions and they are all correct. The weird thing is, the images actually show up on the page. But this makes it very difficult to rearrange images in a gallery, or to add the images. Another weird thing is that if I click “Insert Media” in a post or a page, then my library comes up and it shows my images. I just don’t get it! Can someone please help??