Cannot serve the example application (Windows)

I tried the example in the docs

PS C:\Users\georges\prog> ionic start toto --v2
[=============================] 100% 0.0s
[=============================] 100% 0.0s
Installing Node Modules
Updated the hooks directory to have execute permissions
New! Add push notifications, update your app remotely, and package iOS and Android apps with the Ionic Platform!

New to Ionic? Get started here:

Then I get

PS C:\Users\georges\prog\toto> ionic serve                                                  
∆ Compiling and bundling with Webpack...                                                    
√ Using your webpack.config.js file: C:\Users\georges\prog\toto\webpack.config.js           
multi main                                                                                  
Module not found: Error: Cannot resolve 'file' or 'directory' C:\Users\georges\prog\toto\app
resolve file                                                                                
  C:\Users\georges\prog\toto\app\app.js doesn't exist                                       
  C:\Users\georges\prog\toto\app\app doesn't exist                                          
resolve directory                                                                           
  C:\Users\georges\prog\toto\app\app doesn't exist (directory default file)                 
  C:\Users\georges\prog\toto\app\app\package.json doesn't exist (directory description file)
 @ multi main (CLI v2.0.0-alpha.23)                                                         
Your system information:                                                                    
Cordova CLI: 5.3.3                                                                          
Gulp version:  CLI version 3.9.0                                                            
Gulp local:   Local version 3.9.0                                                           
Ionic Version: 2.0.0-alpha.47                                                               
Ionic CLI Version: 2.0.0-alpha.23                                                           
Ionic App Lib Version: 2.0.0-alpha.22                                                       
Node Version: v4.1.2                                                                                                                                                            

What is the problem ??

The latest CLI version that works with Ionic 2 is 2.0.0-beta.15, please update to this version by running the following:

npm install -g ionic@beta

Then you will want to start a new project.

Here are the docs on this: