Make sure you are using Correct Namespace in Routes on Laravel.

When defining routes in web.php or api.php, make sure you are using the correct namespace for your controller:

php

use App\Http\Controllers\PostController;

Check Controller Namespace: Make sure that the namespace of your PostController is correct. In Laravel, controllers are typically placed in the App\Http\Controllers namespace. So, your PostController should look something like this:

php
namespace App\Http\Controllers;

use Illuminate\Http\Request;

class PostController extends Controller
{
// Your controller code here
}

Composer Dump-Autoload: Run the following command in your terminal to regenerate the list of all classes that need to be included in the project:

php

composer dump-autoload

This command ensures that any changes in the classmap are reflected.

Then to fix  Target class [PostController] does not exist error, open App\Provider\RouteServiceProvider.php and add this line

Open App\Provider\RouteServiceProvider.php and add this line

protected $namespace = 'App\Http\Controllers'; 

Below this line –

public const HOME = '/home';