What is debugattach.aspx and why can't the server find it?

Question

I\'m developing on an XP (SP3) machine with VS 2010 and IIS 5.

I have two versions of the same site. We\'ve released our first production version, so I forked the c

Answer 1

In my case I had created an Empty Web Application with VS2017 on Windows 10. When I unchecked the box for ASP.NET Debugger under Project Settings -> Web the problem went away. Before that I tried almost every suggestion out there to resolve the problem.