errors

Uncaught TypeError: undefined is not a function backbone.marionette.js?body=1:22
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c.extend.add backbone.marionette.js?body=1:22
c.extend.addInitializer backbone.marionette.js?body=1:22
(anonymous function) main.js?body=1:8

Uncaught TypeError: undefined is not a function backbone.marionette.js?body=1:22
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c.extend.add backbone.marionette.js?body=1:22
c.extend.addInitializer backbone.marionette.js?body=1:22
(anonymous function) unauthenticated.js?body=1:26

main.js

Maitsu.Views.Layouts.Unauthenticated = Backbone.Marionette.LayoutView.extend({
  template: 'layouts/unauthenticated',
  regions: {
    tabContent: '#tab-content'
  },

  views: {},

  events: {
    'click ul.nav-tabs li a' : 'switchViews'
  },

  onShow: function() {
    this.views.login = Maitsu.Views.Unauthenticated.Login;
    this.views.signup = Maitsu.Views.Unauthenticated.Signup;
    this.views.retrievePassword = Maitsu.Views.Unauthenticated.RetrievePassword;
    this.tabContent.show(new this.views.login);
  },

  switchViews: function(e) {
    e.preventDefault();
    this.tabContent.show(new this.views[$(e.target).data('content')]);
  }
});

Maitsu.addInitializer(function() {
  Maitsu.layouts.unauthenticated = new Maitsu.Views.Layouts.Unauthenticated();
});

maitsu.js

Maitsu = new Backbone.Marionette.Application();

Maitsu.Views          = {};
Maitsu.Views.Layouts  = {};
Maitsu.Models         = {};
Maitsu.Collections    = {};
Maitsu.Routers        = {};
Maitsu.Helpers        = {};

// Instantiated global layouts
Maitsu.layouts = {};

Maitsu.addRegions({
  main : '#main'
});

Maitsu.vent.on("authentication:logged_in", function() {
  Maitsu.main.show(Maitsu.layouts.main);
});

Maitsu.vent.on("authentication:logged_out", function() {
  Maitsu.main.show(Maitsu.layouts.unauthenticated);
});

Maitsu.bind("start", function() {
  if(Maitsu.currentUser) {
    Maitsu.vent.trigger("authentication:logged_in");
  }
  else {
    Maitsu.vent.trigger("authentication:logged_out");
  }
});

unauthenticated.js

// views/layouts/unauthenticated.js

Maitsu.Views.Layouts.Unauthenticated = Backbone.Marionette.LayoutView.extend({
  template: 'layouts/unauthenticated',
  regions: {
    tabContent: '#tab-content'
  },

  views: {},

  events: {
    'click ul.nav-tabs li a' : 'switchViews'
  },

  onShow: function() {
    this.views.login = Maitsu.Views.Unauthenticated.Login;
    this.views.signup = Maitsu.Views.Unauthenticated.Signup;
    this.views.retrievePassword = Maitsu.Views.Unauthenticated.RetrievePassword;
    this.tabContent.show(new this.views.login);
  },

  switchViews: function(e) {
    e.preventDefault();
    this.tabContent.show(new this.views[$(e.target).data('content')]);
  }
});

Maitsu.addInitializer(function() {
  Maitsu.layouts.unauthenticated = new Maitsu.Views.Layouts.Unauthenticated();
});