Backpack PageManager InvalidArgumentException View [pages.normal] not found

Hi. I'm using Backpack PageManagerand I have created a page called "about" about with a template called "normal". But when I try to access to "site_name/about", I get a error saying " InvalidArgumentException View [pages.normal] not found". I've checked many times but I don't see what's wrong. Can someone help me ?

My routes/web.php

<?php

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function () {
    return view('welcome');
});

Route::group(['prefix' => 'admin', 'middleware' => 'admin'], function(){
    CRUD::resource('customer','Admin\CustomerCrudController');
});

Route::get('{page}/{subs?}', ['uses' => 'PageController@index'])
    ->where(['page' => '^(((?=(?!admin))(?=(?!\/)).))*$', 'subs' => '.*']);

PageManagerServiceProvider.php

<?php

namespace Backpack\PageManager;

use Route;
use Illuminate\Routing\Router;
use Illuminate\Support\ServiceProvider;

class PageManagerServiceProvider extends ServiceProvider
{
    /**
     * Indicates if loading of the provider is deferred.
     *
     * @var bool
     */
    protected $defer = false;

    /**
     * Where the route file lives, both inside the package and in the app (if overwritten).
     *
     * @var string
     */
    public $routeFilePath = '/routes/backpack/pagemanager.php';

    /**
     * Perform post-registration booting of services.
     *
     * @return void
     */
    public function boot()
    {
        // publish views
        $this->publishes([__DIR__.'/resources/views' => base_path('resources/views')], 'views');
        // publish PageTemplates trait
        $this->publishes([__DIR__.'/app/PageTemplates.php' => app_path('PageTemplates.php')], 'trait');
        // publish migrations
        $this->publishes([__DIR__.'/database/migrations' => database_path('migrations')], 'migrations');
        // public config
        $this->publishes([__DIR__.'/config/pagemanager.php' => config_path('backpack/pagemanager.php')]);
        // public languages
        $this->publishes([__DIR__.'/resources/lang' => resource_path('lang/vendor/backpack')], 'lang');

        $this->mergeConfigFrom(__DIR__.'/config/pagemanager.php', 'backpack.pagemanager');
        $this->loadViewsFrom(realpath(__DIR__.'/resources/views/vendor/backpack/crud'), 'pagemanager');
    }

    /**
     * Define the routes for the application.
     *
     * @param  \Illuminate\Routing\Router  $router
     * @return void
     */
    public function setupRoutes(Router $router)
    {
        // by default, use the routes file provided in vendor
        $routeFilePathInUse = __DIR__.$this->routeFilePath;

        // but if there's a file with the same name in routes/backpack, use that one
        if (file_exists(base_path().$this->routeFilePath)) {
            $routeFilePathInUse = base_path().$this->routeFilePath;
        }

        $this->loadRoutesFrom($routeFilePathInUse);
    }

    /**
     * Register any package services.
     *
     * @return void
     */
    public function register()
    {
        $this->setupRoutes($this->app->router);
    }
}

PageController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Backpack\PageManager\app\Models\Page;
use App\Http\Controllers\Controller;

class PageController extends Controller
{
    public function index($slug, $subs = null)
    {
        $page = Page::findBySlug($slug);

        if (!$page)
        {
            abort(404, 'Please go back to our <a href="'.url('').'">homepage</a>.');
        }

        $this->data['title'] = $page->title;
        $this->data['page'] = $page->withFakes();

        return view('pages.'.$page->template, $this->data);
    }
}

Customer.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Backpack\CRUD\CrudTrait;

class Customer extends Model
{
    use CrudTrait;

    /*
    |--------------------------------------------------------------------------
    | GLOBAL VARIABLES
    |--------------------------------------------------------------------------
    */

    protected $table = 'customers';
    // protected $primaryKey = 'id';
    // public $timestamps = false;
    // protected $guarded = ['id'];
    protected $fillable = ['name', 'email', 'phone'];
    // protected $hidden = [];
    // protected $dates = [];

    /*
    |--------------------------------------------------------------------------
    | FUNCTIONS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | RELATIONS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | SCOPES
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | ACCESORS
    |--------------------------------------------------------------------------
    */

    /*
    |--------------------------------------------------------------------------
    | MUTATORS
    |--------------------------------------------------------------------------
    */
}