Anyone Having problem with web apps?

Hi , i published a web app , went to that web app , and it shows me this

This web app worked before
a few of my links work and a few dont , like thunkablecompanion does , and this doesnt :confused:

Oh ok i figured it out , here , i need to go to the index.html link but it doesnt redirect me and thus it shows me that message. I suppose that is a bug? I had to add this and then add the web app id plus add this &from=x