Cordova.js not found - Ionic tutorial




I’m experimenting with the app shown in the ionic tutorial.

I created a new node,js workspace, installed Ionic and Cordova:
npm install -g cordova ionic
ionic start myapp
Selected “tutorial” from the list of templates.
At the question “Would you like to integrate your new app with Cordova to target native iOS and Android?” I selected Yes.
ionic serve myapp
The app starts and I can access it. It appears to work as expected, however in the javascript console, I see the error “cordova.js” not found.
Any idea how to fix this error?

Many thanks in advance.