How do i route by slug?

[Heesel]

When ever i enter my slug in my route i get The resource could not be found.

---- route ----

<?php

use App\Http\Controllers\HomeController;
use Illuminate\Support\Facades\Route;

Route::get('/help/{slug}', [HomeController::class, 'index'])->name('index');

---- end route ----

---- HomeController ----

<?php 
namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Contentful\Delivery\Client as DeliveryClient;

class HomeController extends Controller
{
    private $client;

    public function __construct(DeliveryClient $client)
    {
        $this->client = $client;
    }

    public function index($slug)
    {   
        $entry = $this->client->getEntry($slug);

        
        return view('entry', ['entry' => $entry]);
    }

}

---- End HomeController ----