I followed Ionic 2 Tutorial and created a demo app from tutorial template. There were no CLI issues during the process as we can see below.
I did ionic serve and the below happened.
And I got a blank page with 404 errors and warnings.
Error shows that app.html and app.md.css are missing.
OS - Windows 8.1 Pro.
Chrome Browser Version - 48.0.2564.116 m.
Please let me know if I need to provide any more details and assist as to how I can go about troubleshooting this issue.