Sonata Admin Bundle error:configureShowFields

If you get this two errors:

[2/2] FileLoaderLoadException: Cannot import resource "C:\wamp\www\project\app/config\." from "C:\wamp\www\project\app/config\routing.yml".  -+

[1/2] ErrorException: Runtime Notice: Declaration of Company\NameBundle\Admin\EntityAdmin::configureShowFields() should be compatible with that of Sonata\AdminBundle\Admin\Admin::configureShowFields() in C:\wamp\www\havefun\src\Company\NameBundle\Admin\EntityAdmin.php line 84  -

Check if you included the ShowMapper class like this:
use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Show\ShowMapper;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Validator\ErrorElement;
use Sonata\AdminBundle\Form\FormMapper;

protected function configureShowFields(ShowMapper $showMapper)
    {
        $showMapper
            ->add('name')
            ->add('email')
        ;
    }