Creating a view composer doesn't seem to work

I don't know if I need to do something different when using this package to get view composers to work, but I have done the same thing I always do with a non-modular Laravel app, but can't seem to get it working at all.

I created the ViewServiceProvider for the module.

<?php

namespace Modules\Dashboard\Providers;

use Illuminate\Support\Facades\View;
use Illuminate\Support\ServiceProvider;
use Modules\Dashboard\Composers\SidebarComposer;

class ViewServiceProvider extends ServiceProvider
{
    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        //
    }

    /**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides()
    {
        return [
            View::composer('dashboard::layout.master', SidebarComposer::class)
        ];
    }
}

Then I created my composer file:

<?php

namespace Modules\Dashboard\Composers;

use Illuminate\View\View;
use Nwidart\Modules\Facades\Module;

class SidebarComposer
{   
    /**
     * All modules.
     */ 
    protected $modules;

    /**
    * Create a new sidebar composer.
    *
    * @return void
    */
    public function __construct()
    {
        $this->modules = Module::all();
    }

    /**
     * Bind data to the view.
     *
     * @param  View  $view
     * @return void
     */
    public function compose(View $view)
    {
        $view->with('modules', $this->modules);
    }
}

Then lastly in the module service provider I registered the ViewServiceProvider like this:

    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        $this->app->register(RouteServiceProvider::class);
        $this->app->register(ViewServiceProvider::class);
    }

The problem is that when I try to call the $modules variable from the dashboard view file I only get that it is undefined. Is there something I am missing here?

nWidart / laravel-modules

Creating a view composer doesn't seem to work #1325