IIS error, Unable to start debugging on the webserver

There may be many reasons for the above problem.

You need to check this:- Unable to Start Debugging on the Web Server

On a side note:- Go to IIS and check that the App Pool you are using is started.

Try this from your command line:-

cd %windir%\Microsoft.NET\Framework\v4.0.30319
aspnet_regiis.exe -i

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