Problem submitting form with Standard 5.2?

Question

I developed a website in Laravel that presents a problem in the form because it simply does not work and displays no error on the screen it simply has no action and the strange thing is that localhost the site works for example has an error code that when the user tries to submit the form without filling in the fields displays an error on the localhost it appears already in the lodging it has no action I took a look at the log and also exhibits nothing else anyway follows the log with my code.

Error sending form without filling in fields (localhost)

Errors do not appear in the hosting

:

Website address: http://agenciafront.com.br/aldeia/

Form:

 @if (count($errors) > 0)
                        <div class="alert alert-danger">
                            <ul>
                                @foreach ($errors->all() as $error)
                                    <li>{{ $error }}</li>
                                @endforeach
                            </ul>
                        </div>
                    @endif

                    @if (session('message'))
                        <div class="alert alert-success">
                            {!! session('message')  !!}
                        </div>
                    @endif

                    {!! Form::open(array('action' => 'FormController@postContato', 'role' => 'form', 'class'=>'form')) !!}
                    <div class="form-group"> 
                        <div class="row">
                            <div class="col-md-6">
                                {!! Form::text('nome', null, array('placeholder'=>'Nome')) !!}
                                {!! Form::text('email', null, array('placeholder'=>'E-mail')) !!}
                                {!! Form::text('telefone', null, array('placeholder'=>'Telefone')) !!}
                            </div>
                            <div class="col-md-6">
                                {!! Form::textarea('mensagem', null, array('placeholder'=>'Mensagem', 'rows'=>'5')) !!}
                                {!! Form::submit('Enviar', array('class' => 'btn btn-success'), array('id' => 'btn_submit')) !!}
                            </div>

                        </div>
                    </div>
                    {!! Form::close() !!}

Formcontroller:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Validator;
use Mail;
use App\Http\Requests;

class FormController extends Controller
{
    public function index() {
        return view('/');
    }


    public function postContato(Request $request) {
        $rules = array( 'nome' => 'required', 'email' => 'required|email', 'telefone' => 'required', 'mensagem' => 'required' );
        $errors = [
            'required'    => 'O campo :attribute é obrigatório.',
            'email'    => 'Digite um email válido.',
        ];
        $validation = Validator::make($request->all(), $rules, $errors);
        $data = array();
        $data['nome'] = $request->input("nome");
        $data['email'] = $request->input("email");
        $data['telefone'] = $request->input("telefone");
        $data['mensagem'] = $request->input("mensagem");

        if($validation->passes()) {
            Mail::send('emails.contato', $data, function($message) use($request){
                $message->from($request->input("email"), $request->input("nome"));
                $message->to('[email protected]') ->subject('contato do site');
                $message->bcc('[email protected]') ->subject('Contato do site');

            });
            return redirect('#contato')->with('message', 'Mensagem enviada com sucesso!');
        }
        return redirect('#contato')->withErrors($validation);
    }
}

Route:

<?php

        Route::get('/', function () {
        return view('welcome');
    })->name('home');


    Route::get('coworking',[
        'as' => 'coworking',
        'uses' => 'CoworkingController@index'
    ]);

    Route::get('evento',[
        'as' => 'evento',
        'uses' => 'EventoController@index'
    ]);

    Route::get('sobre',[
        'as' => 'sobre',
        'uses' => 'SobreController@index'
    ]);

    Route::get('criancas',[
        'as' => 'criancas',
        'uses' => 'CriancasController@index'
    ]);

    /*Route::get('contato',[
        'as' => 'contato',
        'uses' => 'ContatoController@index'
    ]);*/

    Route::post('/', 'FormController@postContato');