Hi again, this is really awkward, svg images should work on all modern browsers and also IE 9 and up, i have no idea why they don’t show up on your side. But luckily there is an also png format of the same file in the same folder.
– edit js/photo-swipe/default-skin/default-skin.css in a text editor, find line:57 and remove these lines;
@media (-webkit-min-device-pixel-ratio: 1.1), (min-resolution: 105dpi), (min-resolution: 1.1dppx) {
/* Serve SVG sprite if browser supports SVG and resolution is more than 105dpi */
.pswp--svg .pswp__button, .pswp--svg .pswp__button--arrow--left:before, .pswp--svg .pswp__button--arrow--right:before {
background-image: url(default-skin.svg); }
.pswp--svg .pswp__button--arrow--left, .pswp--svg .pswp__button--arrow--right {
background: none; }
}