Blank Security Warning when Opening Website in Visual Studio 2015

Question

I get a blank security warning popup window when trying to open a website, in Visual Studio 2015 Community Edition. It worked on my other computer in the same environment.

I moves the files to a new fresh computer and I get this window.

Here's a screenshot:

Nothing is clickable, even what where the buttons should be. Visual Studio is just frozen, can't even close the IDE nor the popup window. It doesn't happen to Web Projects, only websites.

Any idea how to solve this?

Answer 1

I got the same issue. Just fixed it. In my case it was entity ".tt" files fault. I guess for some reason VS 2015 does not recognize ".tt" extension. I've just deleted these files and run website (not web application) successfully