for those who just want to browse the catalog: until fixed, you can use apt.izzysoft.de/fdroid/?repo=m… (should images not load, it's because they would be loaded from f-droid.org. If you reload the page, another mirror should be picked for those, and images should show up again. A little lottery: you might hit a slow mirror then 🙈 But you can browse the catalog.)

PS: Just noticed the app list did not consider mirrors for the icons (only the app detail pages did). Fixed now.