If you are new to using angularJS one of the common errors you may run into looks like below.
This is not very serious error. This error simply means that in my page you have defined ng-app directive with a value of AngularWebPortal but I never created module using that directive. This directive is used to create bootstrap root of the application. You can read more about it here.
The fix is very simple. Just create a module that uses that root element directive and you are good to go.
<html ng-app="AngularWebPortal"> ..... </html>
In javascrit file:
var WebPortal = angular.module("AngularWebPortal", );