HTTP error 500.19 - Cannot read configuration file

Question

In one of my ASP.NET apps, all of a sudden I am unable to run it in Visual Studio 2013 due to the error displayed below. It appears that it is trying to open the web.config from

Answer 1

Delete .VS folders that Visual studio created. It might be hidden in your project structure. Unhide the folders and look for .vs folder and delete that folder and rebuild the application.