Error in Laravel 5.7 validation messages

Question

I am working with Laravel validation messages, but always this returning me "validation.min.string", I stopped importing something?

Controller

$this->validate($request, [
        'telefone' => 'required|min:10|max:15'
    ], [
        'telefone.required'=>'Este campo é obrigatório'
    ]);

Alerts.blade.php

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

View

@include('includes.alerts')

where I’m failing to do something?

Thanks in advance!