I'm new to Angular but this has been a bit of an issue.
So if I visit localhost:9000 I am greeted with the index view. If I click on my navbar link to the /about link, I am taken to http://localhost:9000/about and I am greeted with the about view.
However, if I refresh that page when I'm on the /about route. It breaks and tells me: Cannot GET /about If I go back to index it begins to work again. If I refresh on the index it doesn't break. 
I set $locationProvider.html5Mode(true); as well as add <base href="/"> to the head of my index.html file.
Here is the relevant information from my files. (also I'm using Chrome)
app.js
    myApp = angular.module('myApp', ['ngRoute']);
    myApp.config(['$routeProvider', '$locationProvider', function($routeProvider, $locationProvider) {
        $routeProvider
        .when('/', {
            templateUrl: 'views/main.html',
            controller: 'mainController'
        })
        .when('/about', {
            templateUrl: 'views/about.html',
            controller: 'aboutController'
        })
        $locationProvider.html5Mode(true);
    }]);
    myApp.controller('mainController', ['$scope', '$location', '$log', function($scope, $location, $log) {
        $log.info($location.path());
    }]);
    myApp.controller('aboutController', ['$scope', function($scope) {
    }]);
index.html
<!DOCTYPE html>
<html lang="en-us" ng-app="myApp">
  <head>
    <title>myapp</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.1/angular.min.js"></script>
    <script src="https://code.angularjs.org/1.6.1/angular-messages.min.js"></script>
    <script src="https://code.angularjs.org/1.6.1/angular-resource.min.js"></script>
    <script src="https://code.angularjs.org/1.6.1/angular-route.min.js"></script>
    <script src="/scripts/app.js"></script>
    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    <base href="/">
  </head>
  <body>
      <!-- Removed non relevant bootstrap nav bar stuff -->
      <ul class="nav navbar-nav">
        <li><a href="/about">About</a></li>
      </ul>
      <div class="container">
        <div ng-view></div>
      </div>
 </body>
 
    