Store function won't work

Hello. I have a form what is working well on localhost but on server don't access the store function from Controller.

Form:

       {!! Form::open(['method' => 'POST', 'action' => 'HomePageController@store', 'class' => 'appointment-form']) !!}
               ...
                        <div class="pull-right">
                            {!! Form::submit('Submit', ['class' => 'btn btn-default pull-right']) !!}
                        </div>
       {!! Form::close() !!}

Controller:

 /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    { 
	   $input = $request->all();
        dd($input);

        if (Auth::check()) {

        ...

            if (env('MAIL_USERNAME') == '' && env('MAIL_PASSWORD') == '') {
                return back()->with('added', 'Sikeresn rögzitettük az időpont foglalást!');
            }

            $data = array(
                'name' => $user_name,
                'email' => $user_email,
                'washing_plan' => $washing_plan,
                'vehicle_company' => $vehicle_company,
                'vehicle_modal' => $vehicle_modal,
                'vehicle_type' => $vehicle_type,
                'date' => $appointment_date,
                'time_frame' => $time_frame,
            );

            Mail::send('emails.home_appointment_emails', compact('data'), function ($message) use ($data) {
                $message->from(env('MAIL_USERNAME'));
                $message->to($data['email']);
                $message->subject('Időpont foglalás');
            });

            Mail::send('emails.home_appointment_emails', compact('data'), function ($message) use ($data) {
                $message->to(env('MAIL_USERNAME'));
                $message->subject('Új időpont foglalás');
            });

            return back()->with('added', 'Sikeresn rögzitettük az időpont foglalást!');

        } 

    }

Route:

Route::resource('/', 'HomePageController');

Auth::routes();

After submition the form will don"t store the information on database but is refreshing the page. The interesting thing is that I still have a another form on this website that is working properly.