wertex

Here with it I had problems
In your code:
const app = new Vue({
    el: '#app',
    component: { App },
    router
});
My code:
const app = new Vue({
    el: '#app',

wertex

namespace App;

use Illuminate\Database\Eloquent\Model;

class Employee extends Model
{
    // Mass assigned
    protected $fillable = [
        'last_name',
        'first_name',

wertex

<?php

namespace Dadata;

class DadataClient {
    private $url,
            $token;

    public function __construct($url, $token, $secret) {
        $this->url = $url;