I encountered a problem during the first trial of laravel-search, please help!

According to http://laravelacademy.org/post/3781.html to install Elasticsearch (after startup, test the normal return information through curl -X GET http://localhost:9200) and mmanos/laravel-search dependencies accordingly. It explains the configuration and finally wrote the calling program. The program is as follows

<code><?php
namespace App\Http\Controllers\Search;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Mmanos\Search\Search;

class Esearch extends Controller
{
    protected $search;
    public function __construct(Search $search)
    {
        $this->search = $search;
    }
    public function insert(){
        $this->search->insert(
            "post-1",
            array(
                'title' => 'My title',
                'content' => 'The quick brown fox...',
                'status' => 'published',
            ),
            array(
                'created_at' => time(),
                'creator_id' => 5,
            )
        );

    }
    public function res(){
        $results = Search::search('content', 'fox')->get();
        var_dump($results);
    }
}</code>

The access result is as follows, and the error is as follows,

My skill is low, please give me some advice, thank you! ! !

Reply content:

According to http://laravelacademy.org/post/3781.html to install Elasticsearch (after startup, test the normal return information through curl -X GET http://localhost:9200) and mmanos/laravel-search dependencies accordingly. The instructions are configured, and finally the calling program is written. The program is as follows

<code><?php
namespace App\Http\Controllers\Search;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Mmanos\Search\Search;

class Esearch extends Controller
{
    protected $search;
    public function __construct(Search $search)
    {
        $this->search = $search;
    }
    public function insert(){
        $this->search->insert(
            "post-1",
            array(
                'title' => 'My title',
                'content' => 'The quick brown fox...',
                'status' => 'published',
            ),
            array(
                'created_at' => time(),
                'creator_id' => 5,
            )
        );

    }
    public function res(){
        $results = Search::search('content', 'fox')->get();
        var_dump($results);
    }
}</code>

The access result is as follows, the error is as follows,

My skill is low, please give me some advice, thank you! ! !

Look at the comments below, it’s the first one right now.
The academy gentleman’s reply is:

Have you installed the elasticsearch dependent components?