Configuration Error related to targetFramework in web.config

Question

I have made an MVC website in Visual Studio 2015 and it works in my localhost. But when I published my website and put into my host, it doesn\'t work. It gives me this error not

Answer 1

I just had a similar problem following the installation ( windows update) of the KB 3205402.

Big difference with my case: the application worked well before the update !

==> I found in "IIS Manager", in "ISAPI and CGI Restrictions", that the framework ASP.NET v4.0.30319 has been switched to "unauthorized" !

Switching it to "Authorized" resolved my problem