If you have upgraded Visual Studio 2015 from RTM or earlier version to the release one and try to build an Apache Cordova project you might see this error.
When I got this error I tried to Repair the VS2015 install, uninstalled and reinstalled VS2015 and even reinstalled Visual Studio Tools for Apache Cordova but nothing helped. I searched on the internet and finally found the answer here ...
All you need to do is:
- Close all VS instances
- cd %appdata%\Local\Microsoft\Phone Tools”
- rename CoreCon folder to something else
- Launch VS again
Visual Studio will recreate the CoreCon folder with correct content and then you should be able to see the "Ripple" emulator and build Cordova projects.