"could not find inappbrowser plugin" when using ngCordova and Ionic

You will probably get the error when you have installed Cordova v5.4.0 . To solve the issue downgrade your Cordova to v5.3.3 . Also you can follow https://github.com/nraboy/ng-cordova-oauth/issues/57 to get more updates on the issue.

How to downgrade Cordova can be found in my blog http://rakesh1988.blogspot.sg/2015/11/downgrading-cordova-installing-older.html

Cheers!!!