Hola, puedo preguntar que provedor de Internet tienen?
Parece un error de Itch, pero tambien puede ser del proveedor..
For Itch devs, here is a Firefox Console Error:
The loading of “https://itch.io/download-proxy/itchio/upload2/game/......”
in a frame is denied by “X-Frame-Options“ directive set to “sameorigin“ [Learn More]