I am having the same issue with all images (logo, favicon background). I am currently working on a local wordpress install. When I select the images in the settings interface they show but when I save the settings I get the broken image link icon and when I log out and check the site, the maintenance page comes up but without the images I added. I am using the under construction page version 2.5. WordPress version 4.5.2
Please help. Thank you!