Well, it's hard to explain but my submission use iframes with itself in it (the app load the app which load the app in frames).
But itch seems to prevent iframes. Not only iframes from other domains.
That's the point.
I feel a little bit angry for a lot of reasons, not only after the sitelock update. The gamejam was planned for August 2019. It was then decided to add one more month. Then the magazine take two more months to set the winners and another month before announcing the winner (the next magazine printing. And the sitelock update comes in the middle of all those delays.
It's bad luck as if any of those steps did not happened, I would have not face any issue.
So yeah, there is a little bit of bitterness in all that stack of events, unfortunately for myself.
Is it your fault ? No, it's not your only fault. Is it the gamejam endorsers one ? No, it's not their only fault.
Is it mine ? Yeah, sure. I should have switch from web to downloadable content sooner than what I do.
But the sitelock update should not have prevent a legitimate Itch.io hosted game to run on the Itch.io platform. That's what I tried to explain (not in my native language).