I have following package.json configuration
\"dependencies\": { \"@angular/common\": \"2.2.1\", \"@angular/compiler\": \"2.2.1\", \"@angular/core\": \"2.2.1\", \
had the same issue starting today.
The solution I found was to change the angular-cli dependency in package.json file to "1.0.0-beta.19-3" and reinstall the npm packages.
{ "devDependencies": { ... "angular-cli": "1.0.0-beta.19-3", ... } }
Hope this helps!