Error in Laravel 5.4 "TokenMismatchException in VerifyCsrfToken.php" I'm using {!! csrf_field() !!}

I'm with a big error, In local all ok, but in web server(production) it's error "TokenMismatchException in VerifyCsrfToken.php". My CODE:

FORM

<form role="form" method="post" action="{{ route('front.login') }}" class="login-form">
    {!! csrf_field() !!}
    <div class="form-group @if ($errors->has('email')) has-error @endif">
        <label class="sr-only" for="form-username">Email</label>
        <input type="email" name="email" placeholder="Email..." class="form-username form-control @if($errors->has('email')) input-error  @endif" id="form-username" value="{{ old('email') }}">
    @if ($errors->has('email')) <p class="help-block"> {{ $errors->first('email') }} </p></div> @endif
    </div>
    <div class="form-group @if ($errors->has('password')) has-error @endif">
        <label class="sr-only" for="form-password">Senha</label>
        <input type="password" name="password" placeholder="Senha..." class="form-password form-control @if($errors->has('password')) input-error  @endif" id="form-password" value="{{ old('password') }}">
        @if ($errors->has('password')) <p class="help-block"> {{ $errors->first('password') }} </p> @endif
        </div>
        <div class="form-group text-center">
            <button type="submit" class="btn btn-dark-blue text-center">Entrar no Sistema</button>
        </div>
</form>

CONTROLLER

$this->validate($request,[
    'email' => 'required',
    'password' => 'required'
]);

$data = [
    'email' => $request->input("email"),
    'password' => $request->input("password")
];

if(Auth::attempt($data)){
    return redirect()->route('front.home');
}