yeoman generator-ember doesn't show anything in browser - ember.js

Question

Following this https://github.com/yeoman/generator-ember tutorial to use EmberJS with Yeomane, after running grunt server the browser is blank.
I expected to see this page but nothing shows up:![enter image description here][1]
UPDATE:
console error:
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/styles/style.css
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/jquery/jquery.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/handlebars/handlebars.runtime.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/ember/ember.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/ember-data-shim/ember-data.js
Uncaught ReferenceError: Ember is not defined compiled-templates.js:1
Uncaught ReferenceError: Ember is not defined combined-scripts.js:3
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/affix.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/alert.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/dropdown.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/tooltip.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/modal.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/transition.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/button.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/popover.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/carousel.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/scrollspy.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/collapse.js
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/bower_components/bootstrap-sass/js/tab.js
Update 2:
works-Mac:myemberapp1 work$ grunt server
Running "server" task
Running "clean:server" (clean) task
Running "replace:app" (replace) task
Replace app/index.html -> .tmp/index.html
Running "concurrent:server" (concurrent) task
Running "emberTemplates:dist" (emberTemplates) task
File ".tmp/scripts/compiled-templates.js" created.
Done, without errors.
Running "compass:server" (compass) task
Done, without errors.
Running "neuter:app" (neuter) task
Running "connect:livereload" (connect) task
Started connect web server on localhost:9000.
Running "open:server" (open) task
Running "watch" task
Waiting...

Answer 1

For the specific error Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:9000/styles/style.css, you should also check that you have got the compass server installed. That is:
gem install compass
To check that compass is running correctly, run grunt serve --verbose and check the output for any errors, such as:
in `to_specs': Could not find compass (>= 0) amongst [...] (Gem::LoadError)

Answer 2

After the scaffolding is complete, you must run the commands bower install and npm install to install the required packages (described in the bower.json and package.json files. After this, grunt will be able to serve up the dependencies.
As you build up your project and use introduce new dependencies, you'll add them by editing your bower.json and/or package.json files and rerunning the installs. Downloaded packages are usually not stored in source control.