I get this error message when I\'m trying to start the application.
An error occurred attempting to determine the process id of the DNX process host
For other people having this problem, in cases in which the other solutions don't work - I found the answer in this thread: Forcing to use SSL: An error ocurred attempting to determine the process id of the DNX process hosting your application
I your project uses or enforces SSL run it without debugging (CTRL+F5) first, it will ask you to generate a local SSL cert, and after that debugging will work and the error will be gone.