My client can't view my html file

Hi all,

I am not very experienced in Edge, but here is a problem I never experienced on previous versions. When I sent a publish folder, my client wasn't able to view the .html file in her browser.

I opened it successfully on another mac, and when I tried on my friend's PC, I have a "Page not found" notification in Chrome.

Would somebody have a explanation for this by any chance?

I tried sending the publish file and the whole project folder and I experienced the same problem on my friend's PC.

Thank you!