The download button for my game was working yesterday, then today it stopped appearing.

https://haroldo-ok.itch.io/catacomb-abbyss-md

I tried editing and saving again: the download button still didn't appear on the main page.
I tried editing, deleting the file, uploading the file a again and then saving again: the download button still didn't appear on the main page.

BTW, I forgot to post the link: https://haroldo-ok.itch.io/catacomb-abbyss-md

OK, setting it to "no payment " works around the problem 

The button is shown, but not the file. It is still undownloadable.