Jul 21, 2016 02:54 AM|Angie xu - MSFT|LINK
When I loaded a web application, and I tried to load the aspnet web sites, then I received the message
Please create a new asp.net web application locally, and check whether it has same issue. In this way, we can know whether it is Visual Studio issue or not.
In addition, it's also recommended to clean and rebuild your project, and it might help.