Azure website message “You do not have permission to view this directory or page.”. What to do?

Question

After I published an ASP.NET Core app to Azure from Visual Studio 2017 I am getting this message when I click on the app url:

It was working fine before. Is

Answer 1

Another useful workaround is on the page Jimmy pointed out go to "Defaul documents" tab and add the name of your main file (it should be index.html) but if not add it.

That solved my problem.