I uploaded a zip archive with index.html based on the video from the office. channel, but I still get the message “The developer has not uploaded a game yet...”. What could be the problem?

Try sending a screenshot, that might help.

upload the itch io game url in a new post

Wait, does the zip cotain only the index.html file?

If so, you have to zip the whole folder.

You need the other files for the game to work.

No. I archived all the game resources.

All. I understood the reason. For some reason, itch didn’t write what the problem was, but now he did. Thanks for the help. I hope I will have time to resolve this issue.