VS2010 error: Unable to start debugging on the web server

Question

I get error message \"Unable to start debugging on the web server\" in Visual Studio 2010. I clicked the Help button and followed the related suggestions without success.

Answer 1

Having tried all of the solutions above, I was still having this issue. Other projects were debugging without issue, so I knew it had to be something to do with this particular application's configuration.

Mine is an MVC app running under IIS 8. The issue was with URL Rewriting.

I had a rule to enforce trailing slashes. All I had to do was disable it (which can be done in IIS directly, or via the web.config below - just set enabled="false")