Same thing is happening to me, but only on some pages.
These are working:
https://biim.itch.io/fps-on-rails-template
https://biim.itch.io/spooky-background-asset
https://biim.itch.io/5x7-tiny-sprite-font
These no:
https://biim.itch.io/creepy-mahjong
https://biim.itch.io/test-demo-of-8-bit-pixel-art-side-scrolling-shooter-beginne...
https://biim.itch.io/8-bit-pixel-art-side-scrolling-shooter-beginner-assets-bund...
https://biim.itch.io/64x64-ill-fated
https://biim.itch.io/64x64-ufos
Checking on the Internet I saw that this happened in the past due to server problem, however the funny thing is that some links are working and others no.
To be precise the 3 pages of mine that are working are my last 3 projects, so perhaps more than one server is used and the old one is collapsed?