How do I load a game on dropbox to play??

I used to export my games to HTML and put them into dropbox so I could see how they will look on different devices, now I cannot do that?? I get a message that the "Exported file will not work until uploaded" So now I have to create my own webpage just to do what I did before?

I'm very confused, any help would be great.

Thanks in advance!

Make sure it's in a public folder and get the link from the index file.